javascript – Failed to load resource: the server responded with a status of 404 ()

tengo un problema muy raro y la verdad no se por que. Intento enviar un parámetro usando Jquery y Ajax llamado “idCategory” a un controlador en Spring pero a la hora de enviarlo sale esto en la url:

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JavaScript:

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Les agradecería su ayuda para solucionar este problema, muchas gracias.

Database Connection Failed

While trying to check the Database connection through my application server, the below error has occurred:
Database connection test failed

appreciate your assistant
Regards

Google Cloud storage failed at certain files

  1. how to check which folders/files cause my backup failed from the local server to the bucket?
  2. Is there any indicator/email notification if the backup fails?

Thanks

wallet.dat – “wallet corrupt salvage failed” Error. Help with pywallet

I wrote a guide to corrupt Bitcoin Wallet recovery. Yes, you should use pywallet. It can dump the private keys from your wallet to a file even if Bitcoin Core fails to salvage it. You can then import them into a new wallet.

Dump the wallet with pywallet to extract the private keys:

python pywallet.py –dumpwallet > wallet.text --passphrase= PASSPHRASE

Now find the address containing your Bitcoins and sweep the private key.

failed loading custom repository config /etc/yum.repos.d/kubernetes.repo in CentOS 8

I am add a custom repository config in CentOS 8 like this in my kvm virtual machine like this:

[root@localhost ~]# cat /etc/yum.repos.d/kubernetes.repo 
[kubernetes]
   name=Kubernetes
   baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
   enabled=1
   gpgcheck=0
   repo_gpgcheck=0
   gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
       http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

but when I using this command to install kuberentes component, it shows me like this:

[root@localhost ~]# yum -y install kubelet kubeadm kubectl
Warning: failed loading '/etc/yum.repos.d/kubernetes.repo', skipping.
Last metadata expiration check: 0:37:38 ago on Sun 05 Jul 2020 08:38:19 AM EDT.
No match for argument: kubelet
No match for argument: kubeadm
No match for argument: kubectl

am I missing something? what should I do to fix this problem?

boot – rEFInd install failed

I am dual booting Windows 10 and Arch Linux. I installed Arch with GRUB2 first, then Windows, then created a bootable rEFInd USB, made sure each of its three options (Windows, GRUB, Arch) booted correctly, then hit install to disk. Well, apparently, it didn’t install correctly because (a) starting up without the USB launches GRUB, and (b) selecting rEFInd from the new USB option boots Windows; it shows:

Starting bootmgfw.efi
Using load options ''

Here’s the directory structure of the boot partition. First, a basic overview:

# mount /dev/nvme0n1p1 /boot/efi
# tree -L 3 /boot/efi
/boot/efi
├── EFI
│   ├── Boot
│   │   └── bootx64.efi
│   ├── GRUB
│   │   └── grubx64.efi
│   ├── Microsoft
│   │   ├── Boot
│   │   └── Recovery
│   ├── refind
│   │   ├── BOOT.CSV
│   │   ├── drivers_x64
│   │   ├── icons
│   │   ├── icons-backup
│   │   ├── icons-old
│   │   ├── keys
│   │   ├── refind.conf
│   │   ├── refind.conf-sample
│   │   └── refind_x64.efi
│   └── tools
└── System Volume Information
    ├── AadRecoveryPasswordDelete
    └── ClientRecoveryPasswordRotation

16 directories, 6 files

And the entire structure:

# tree /boot/efi
/boot/efi
├── EFI
│   ├── Boot
│   │   └── bootx64.efi
│   ├── GRUB
│   │   └── grubx64.efi
│   ├── Microsoft
│   │   ├── Boot
│   │   │   ├── BCD
│   │   │   ├── BCD.LOG
│   │   │   ├── BCD.LOG1
│   │   │   ├── BCD.LOG2
│   │   │   ├── bg-BG
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── bootmgfw.efi
│   │   │   ├── bootmgr.efi
│   │   │   ├── BOOTSTAT.DAT
│   │   │   ├── boot.stl
│   │   │   ├── cs-CZ
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── da-DK
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── de-DE
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── el-GR
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── en-GB
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── en-US
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── es-ES
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── es-MX
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── et-EE
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── fi-FI
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── Fonts
│   │   │   │   ├── chs_boot.ttf
│   │   │   │   ├── cht_boot.ttf
│   │   │   │   ├── jpn_boot.ttf
│   │   │   │   ├── kor_boot.ttf
│   │   │   │   ├── malgun_boot.ttf
│   │   │   │   ├── malgunn_boot.ttf
│   │   │   │   ├── meiryo_boot.ttf
│   │   │   │   ├── meiryon_boot.ttf
│   │   │   │   ├── msjh_boot.ttf
│   │   │   │   ├── msjhn_boot.ttf
│   │   │   │   ├── msyh_boot.ttf
│   │   │   │   ├── msyhn_boot.ttf
│   │   │   │   ├── segmono_boot.ttf
│   │   │   │   ├── segoen_slboot.ttf
│   │   │   │   ├── segoe_slboot.ttf
│   │   │   │   └── wgl4_boot.ttf
│   │   │   ├── fr-CA
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── fr-FR
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── hr-HR
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── hu-HU
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── it-IT
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── ja-JP
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── kd_02_10df.dll
│   │   │   ├── kd_02_10ec.dll
│   │   │   ├── kd_02_1137.dll
│   │   │   ├── kd_02_14e4.dll
│   │   │   ├── kd_02_15b3.dll
│   │   │   ├── kd_02_1969.dll
│   │   │   ├── kd_02_19a2.dll
│   │   │   ├── kd_02_1af4.dll
│   │   │   ├── kd_02_8086.dll
│   │   │   ├── kd_07_1415.dll
│   │   │   ├── kd_0C_8086.dll
│   │   │   ├── kdnet_uart16550.dll
│   │   │   ├── kdstub.dll
│   │   │   ├── ko-KR
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── lt-LT
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── lv-LV
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── memtest.efi
│   │   │   ├── nb-NO
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── nl-NL
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── pl-PL
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── pt-BR
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── pt-PT
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── qps-ploc
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── Resources
│   │   │   │   ├── bootres.dll
│   │   │   │   └── en-US
│   │   │   │       └── bootres.dll.mui
│   │   │   ├── ro-RO
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── ru-RU
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── sk-SK
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── sl-SI
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── sr-Latn-RS
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── sv-SE
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── tr-TR
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   ├── uk-UA
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   └── bootmgr.efi.mui
│   │   │   ├── winsipolicy.p7b
│   │   │   ├── zh-CN
│   │   │   │   ├── bootmgfw.efi.mui
│   │   │   │   ├── bootmgr.efi.mui
│   │   │   │   └── memtest.efi.mui
│   │   │   └── zh-TW
│   │   │       ├── bootmgfw.efi.mui
│   │   │       ├── bootmgr.efi.mui
│   │   │       └── memtest.efi.mui
│   │   └── Recovery
│   │       ├── BCD
│   │       ├── BCD.LOG
│   │       ├── BCD.LOG1
│   │       └── BCD.LOG2
│   ├── refind
│   │   ├── BOOT.CSV
│   │   ├── drivers_x64
│   │   │   └── ext4_x64.efi
│   │   ├── icons
│   │   │   ├── arrow_left.png
│   │   │   ├── arrow_right.png
│   │   │   ├── boot_linux.png
│   │   │   ├── boot_win.png
│   │   │   ├── func_about.png
│   │   │   ├── func_bootorder.png
│   │   │   ├── func_csr_rotate.png
│   │   │   ├── func_exit.png
│   │   │   ├── func_firmware.png
│   │   │   ├── func_hidden.png
│   │   │   ├── func_install.png
│   │   │   ├── func_reset.png
│   │   │   ├── func_shutdown.png
│   │   │   ├── mouse.png
│   │   │   ├── os_arch.png
│   │   │   ├── os_artful.png
│   │   │   ├── os_bionic.png
│   │   │   ├── os_centos.png
│   │   │   ├── os_chakra.png
│   │   │   ├── os_chrome.png
│   │   │   ├── os_clover.png
│   │   │   ├── os_crunchbang.png
│   │   │   ├── os_debian.png
│   │   │   ├── os_devuan.png
│   │   │   ├── os_elementary.png
│   │   │   ├── os_fedora.png
│   │   │   ├── os_freebsd.png
│   │   │   ├── os_frugalware.png
│   │   │   ├── os_gentoo.png
│   │   │   ├── os_gummiboot.png
│   │   │   ├── os_haiku.png
│   │   │   ├── os_hwtest.png
│   │   │   ├── os_kubuntu.png
│   │   │   ├── os_legacy.png
│   │   │   ├── os_linuxmint.png
│   │   │   ├── os_linux.png
│   │   │   ├── os_lubuntu.png
│   │   │   ├── os_mac.png
│   │   │   ├── os_mageia.png
│   │   │   ├── os_mandriva.png
│   │   │   ├── os_netbsd.png
│   │   │   ├── os_network.png
│   │   │   ├── os_opensuse.png
│   │   │   ├── os_redhat.png
│   │   │   ├── os_refind.png
│   │   │   ├── os_refit.png
│   │   │   ├── os_slackware.png
│   │   │   ├── os_suse.png
│   │   │   ├── os_systemd.png
│   │   │   ├── os_trusty.png
│   │   │   ├── os_ubuntu.png
│   │   │   ├── os_unknown.png
│   │   │   ├── os_void.png
│   │   │   ├── os_win8.png
│   │   │   ├── os_win.png
│   │   │   ├── os_xenial.png
│   │   │   ├── os_xubuntu.png
│   │   │   ├── os_zesty.png
│   │   │   ├── README
│   │   │   ├── tool_apple_rescue.png
│   │   │   ├── tool_fwupdate.png
│   │   │   ├── tool_memtest.png
│   │   │   ├── tool_mok_tool.png
│   │   │   ├── tool_netboot.png
│   │   │   ├── tool_part.png
│   │   │   ├── tool_rescue.png
│   │   │   ├── tool_shell.png
│   │   │   ├── tool_windows_rescue.png
│   │   │   ├── transparent.png
│   │   │   ├── vol_external.png
│   │   │   ├── vol_internal.png
│   │   │   ├── vol_net.png
│   │   │   └── vol_optical.png
│   │   ├── icons-backup
│   │   │   ├── arrow_left.png
│   │   │   ├── arrow_right.png
│   │   │   ├── boot_linux.png
│   │   │   ├── boot_win.png
│   │   │   ├── func_about.png
│   │   │   ├── func_bootorder.png
│   │   │   ├── func_csr_rotate.png
│   │   │   ├── func_exit.png
│   │   │   ├── func_firmware.png
│   │   │   ├── func_hidden.png
│   │   │   ├── func_install.png
│   │   │   ├── func_reset.png
│   │   │   ├── func_shutdown.png
│   │   │   ├── mouse.png
│   │   │   ├── os_arch.png
│   │   │   ├── os_artful.png
│   │   │   ├── os_bionic.png
│   │   │   ├── os_centos.png
│   │   │   ├── os_chakra.png
│   │   │   ├── os_chrome.png
│   │   │   ├── os_clover.png
│   │   │   ├── os_crunchbang.png
│   │   │   ├── os_debian.png
│   │   │   ├── os_devuan.png
│   │   │   ├── os_elementary.png
│   │   │   ├── os_fedora.png
│   │   │   ├── os_freebsd.png
│   │   │   ├── os_frugalware.png
│   │   │   ├── os_gentoo.png
│   │   │   ├── os_gummiboot.png
│   │   │   ├── os_haiku.png
│   │   │   ├── os_hwtest.png
│   │   │   ├── os_kubuntu.png
│   │   │   ├── os_legacy.png
│   │   │   ├── os_linuxmint.png
│   │   │   ├── os_linux.png
│   │   │   ├── os_lubuntu.png
│   │   │   ├── os_mac.png
│   │   │   ├── os_mageia.png
│   │   │   ├── os_mandriva.png
│   │   │   ├── os_netbsd.png
│   │   │   ├── os_network.png
│   │   │   ├── os_opensuse.png
│   │   │   ├── os_redhat.png
│   │   │   ├── os_refind.png
│   │   │   ├── os_refit.png
│   │   │   ├── os_slackware.png
│   │   │   ├── os_suse.png
│   │   │   ├── os_systemd.png
│   │   │   ├── os_trusty.png
│   │   │   ├── os_ubuntu.png
│   │   │   ├── os_unknown.png
│   │   │   ├── os_void.png
│   │   │   ├── os_win8.png
│   │   │   ├── os_win.png
│   │   │   ├── os_xenial.png
│   │   │   ├── os_xubuntu.png
│   │   │   ├── os_zesty.png
│   │   │   ├── README
│   │   │   ├── tool_apple_rescue.png
│   │   │   ├── tool_fwupdate.png
│   │   │   ├── tool_memtest.png
│   │   │   ├── tool_mok_tool.png
│   │   │   ├── tool_netboot.png
│   │   │   ├── tool_part.png
│   │   │   ├── tool_rescue.png
│   │   │   ├── tool_shell.png
│   │   │   ├── tool_windows_rescue.png
│   │   │   ├── transparent.png
│   │   │   ├── vol_external.png
│   │   │   ├── vol_internal.png
│   │   │   ├── vol_net.png
│   │   │   └── vol_optical.png
│   │   ├── icons-old
│   │   │   ├── arrow_left.png
│   │   │   ├── arrow_right.png
│   │   │   ├── boot_linux.png
│   │   │   ├── boot_win.png
│   │   │   ├── func_about.png
│   │   │   ├── func_bootorder.png
│   │   │   ├── func_csr_rotate.png
│   │   │   ├── func_exit.png
│   │   │   ├── func_firmware.png
│   │   │   ├── func_hidden.png
│   │   │   ├── func_install.png
│   │   │   ├── func_reset.png
│   │   │   ├── func_shutdown.png
│   │   │   ├── mouse.png
│   │   │   ├── os_arch.png
│   │   │   ├── os_artful.png
│   │   │   ├── os_bionic.png
│   │   │   ├── os_centos.png
│   │   │   ├── os_chakra.png
│   │   │   ├── os_chrome.png
│   │   │   ├── os_clover.png
│   │   │   ├── os_crunchbang.png
│   │   │   ├── os_debian.png
│   │   │   ├── os_devuan.png
│   │   │   ├── os_elementary.png
│   │   │   ├── os_fedora.png
│   │   │   ├── os_freebsd.png
│   │   │   ├── os_frugalware.png
│   │   │   ├── os_gentoo.png
│   │   │   ├── os_gummiboot.png
│   │   │   ├── os_haiku.png
│   │   │   ├── os_hwtest.png
│   │   │   ├── os_kubuntu.png
│   │   │   ├── os_legacy.png
│   │   │   ├── os_linuxmint.png
│   │   │   ├── os_linux.png
│   │   │   ├── os_lubuntu.png
│   │   │   ├── os_mac.png
│   │   │   ├── os_mageia.png
│   │   │   ├── os_mandriva.png
│   │   │   ├── os_netbsd.png
│   │   │   ├── os_network.png
│   │   │   ├── os_opensuse.png
│   │   │   ├── os_redhat.png
│   │   │   ├── os_refind.png
│   │   │   ├── os_refit.png
│   │   │   ├── os_slackware.png
│   │   │   ├── os_suse.png
│   │   │   ├── os_systemd.png
│   │   │   ├── os_trusty.png
│   │   │   ├── os_ubuntu.png
│   │   │   ├── os_unknown.png
│   │   │   ├── os_void.png
│   │   │   ├── os_win8.png
│   │   │   ├── os_win.png
│   │   │   ├── os_xenial.png
│   │   │   ├── os_xubuntu.png
│   │   │   ├── os_zesty.png
│   │   │   ├── svg
│   │   │   │   ├── boot_win.svg
│   │   │   │   ├── func_csr_rotate.svg
│   │   │   │   ├── mouse.svg
│   │   │   │   ├── os_clover.svg
│   │   │   │   ├── os_debian.svg
│   │   │   │   ├── os_devuan.svg
│   │   │   │   ├── os_elementary.svg
│   │   │   │   ├── os_gummiboot.svg
│   │   │   │   ├── os_haiku.svg
│   │   │   │   ├── os_legacy.svg
│   │   │   │   ├── os_mac.svg
│   │   │   │   ├── os_netbsd.svg
│   │   │   │   ├── os_redhat.svg
│   │   │   │   ├── os_refind.svg
│   │   │   │   ├── os_refit.svg
│   │   │   │   ├── os_win.svg
│   │   │   │   ├── os_xenial.svg
│   │   │   │   ├── tool_fwupdate.svg
│   │   │   │   ├── tool_memtest.svg
│   │   │   │   └── tool_rescue.svg
│   │   │   ├── tool_apple_rescue.png
│   │   │   ├── tool_fwupdate.png
│   │   │   ├── tool_memtest.png
│   │   │   ├── tool_mok_tool.png
│   │   │   ├── tool_netboot.png
│   │   │   ├── tool_part.png
│   │   │   ├── tool_rescue.png
│   │   │   ├── tool_shell.png
│   │   │   ├── tool_windows_rescue.png
│   │   │   ├── transparent.png
│   │   │   ├── vol_external.png
│   │   │   ├── vol_internal.png
│   │   │   ├── vol_net.png
│   │   │   └── vol_optical.png
│   │   ├── keys
│   │   ├── refind.conf
│   │   ├── refind.conf-sample
│   │   └── refind_x64.efi
│   └── tools
└── System Volume Information
    ├── AadRecoveryPasswordDelete
    └── ClientRecoveryPasswordRotation

56 directories, 383 files

What should I do? I’d be happy to post more info, but this is all I know might be relevant. Thanks in advance.

finite element method – Problem with NDSolveValue : “The function value {$Failed} is not a list of numbers with dimensions…”

I was having fun modifying a code given to me as an answer to a previous problem here, courtesy of user Alex Trounev (Thank you again), when I encountered a certain error which I had never seen before.

Here is the aforesaid code :

(*parameters*)
r0 = 0.5;
h = 1;
(Alpha) = 0.8;

(*region definition*)
reg = Cuboid({.5, 0., 0.}, {1., 2 Pi, 1.});

reg3D = ImplicitRegion(
   r0^2 <= x^2 + y^2 <= 1 && 0 <= z <= 1, {x, y, z});

(*equation + conditions*)
eq1 = D(u(t, r, (Theta), z), 
    t) - (D(u(t, r, (Theta), z), r, r) + 
     1/r*D(u(t, r, (Theta), z), r) - 
     1/((Alpha)^2 r^2) D(u(t, r, (Theta), z), (Theta), (Theta)) + 
     D(u(t, r, (Theta), z), z, z));

ic = u(0, r, (Theta), z) == 1;

bc = DirichletCondition(u(t, r, (Theta), z) == Exp(-5 t), r == r0);
nV = NeumannValue(1, r == 1);
pbc = PeriodicBoundaryCondition(u(t, r, (Theta), z), (Theta) == 0, 
   TranslationTransform({0, 2 (Pi)*(Alpha), 0}));


(*solution computation*)
sol = NDSolveValue({eq1 == nV, ic, bc, pbc}, 
   u, {t, 0, 2}, {r, (Theta), z} (Element) reg);

(*frames=Table(DensityPlot3D(sol(t,Sqrt(x^2+y^2),ArcTan(x,y),z),{x,y,
z}(Element)reg3D,ColorFunction(Rule)"Rainbow",OpacityFunction(Rule)
None,Boxed(Rule)False,Axes(Rule)False,PlotRange(Rule){0,1.5},
PlotPoints(Rule)50,PlotLabel(Rule)Row({"t = 
",t}),ColorFunctionScaling(Rule)False),{t,.05,1,.05})
ListAnimate(frames)*)

When I run the code, after some time, I get greeted with the following error :

NDSolveValue::nlnum: The function value {$Failed} is not a list of numbers with dimensions {39639} at {t,u(t,r,(Theta),z),(u^(1,0,0,0))(t,r,(Theta),z)} = {0.0138161,{<<1>>},{-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,<<15>>,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,-4.66626,<<39589>>}}.

When I click on the three dots next to the error, I don’t find any information on the error like it’s usually the case. I then decide to google some answers.
I found some answers here while also trying to comprehend the error by looking at this and finally that answer here.

So if I did understand it correctly, such error arises when you use NDSolve (or NDSolveValue) to get a symbolical solution to your equation, but problems come up when you try to numerically evaluate it for plotting purpose, or when trying to get a symbolical result with a function that requires numerical values ?

In any case, I do not really understand why I get such error as my plot part is currently between (* … *) so it shouldn’t matter. As for the rest of the code, I do not really see an error but I am just a beginner so…

Anyway, can a kind fellow enlighten me please ?

apt – how to fix “failed to download respository information”

i was trying to install Steam on my Ubuntu 15.04, and after trying unsusccesfully to install it through the terminal, i just searched through the software center and tried to download it, but it says “failed to download respository information. check internet connection”. i tried to upgrade my ubuntu to 16.04, tried to change my software sites in “software and updates” and nothing. i dont have any idea how to solve this, so here goes the details of the error when i try to install Steam:

ALSO: i cant install it through the .deb archive; it says
“dependency is not satisfiable: libnss3 (>=2:3.26)

i tried everything, but theres always some kind of error… please help!

, W:Failed to fetch cdrom://Ubuntu 14.10 _Utopic Unicorn_ - Release amd64 (20141022.1)/dists/utopic/main/binary-amd64/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 14.10 _Utopic Unicorn_ - Release amd64 (20141022.1)/dists/utopic/restricted/binary-amd64/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 14.10 _Utopic Unicorn_ - Release amd64 (20141022.1)/dists/utopic/main/binary-i386/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 14.10 _Utopic Unicorn_ - Release amd64 (20141022.1)/dists/utopic/restricted/binary-i386/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/main/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/restricted/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/multiverse/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/universe/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/main/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/restricted/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/multiverse/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-security/universe/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/restricted/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/universe/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/main/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/multiverse/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/restricted/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/universe/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/main/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-proposed/multiverse/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/main/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/restricted/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/multiverse/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/universe/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/main/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/restricted/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/multiverse/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch https://dl.winehq.org/wine-builds/ubuntu/dists/vivid/main/source/Sources  HttpError404
, W:Failed to fetch https://dl.winehq.org/wine-builds/ubuntu/dists/vivid/main/binary-amd64/Packages  HttpError404
, W:Failed to fetch https://dl.winehq.org/wine-builds/ubuntu/dists/vivid/main/binary-i386/Packages  HttpError404
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid/universe/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/main/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/restricted/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/multiverse/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/universe/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/main/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/restricted/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/multiverse/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-updates/universe/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/main/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/restricted/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/universe/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/multiverse/binary-amd64/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/main/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/restricted/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/universe/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, W:Failed to fetch http://br.archive.ubuntu.com/ubuntu/dists/vivid-backports/multiverse/binary-i386/Packages  404  Not Found (IP: 200.236.31.4 80)
, E:Some index files failed to download. They have been ignored, or old ones used instead.```

Failed to execute ‘atob’ on ‘Window’

Estoy enviando la siguiente cadena "Búsqueda no encontrada" al enviarla sin la ú la toma perfectamente, pero cuando va con ú sale el siguiente error:

Uncaught DOMException: Failed to execute ‘atob’ on ‘Window’: The string to be decoded is not correctly encoded.

El codigo js es el siguiente:

 w._getParameterByName = function (name) {
    name = name.replace(/(()/, "\(").replace(/())/, "\)");
    var regex = new RegExp("(\?&)" + name + "=((^&#)*)"),
        results = regex.exec(location.search);
    return results === null ? "" : atob(decodeURIComponent(results(1).replace(/+/g, " ")));
};

Agradezco su ayuda