Error encountered: An unknown error occurred while access the upgrade file.

[samayann]

Hi all,

I was upgrading my call manager subscriber server from 7.1.3.10000-11 build to 8.0.2.41006-1 build, got the following error and the upgrade failed,

Status: Error encountered: An unknown error occurred while access the upgrade file.

While the same upgrade was successful on the pub.

Need help.

[Aaron Harrison]

Hi

You mean the same downloaded file? Or the same exact CD?

Aaron

[samayann]

Aaron,

Its the same downloaded file.

[Brad Martin]

I found that when upgrading from a remote machine I had to point to a directory with only the upgrade file in it. Prior to that I got the same error.

[David Hailey]

Brad,

I've seen that a number of times with 7x upgrade files.  I would like to say it's consistent but it hasn't always been.  I've done a number of upgrades and sometimes I would run across that issue and other times, I would not (there would be multiple files in the SFTP path).  After a few times, I just started always putting my upgrade file in a dedicated folder.

Good catch...and you're not alone in experiencing it.

Hailey

[satish rawat]

I faced same error while upgrading 7.0.2 to 7.1.3-20000-2 and after failing few times here is what i tried

1. add a ntp server to server ( even though the NTP was not really reachable ..just add one on server before you start upgrade)

2. try placing only one file on sftp root directory..

[Jim Pilgrim]

This is still happening in 11.x upgrade attempts, put OS in permissive mode and make sure there is only one file the directory path.  Random results with this one.

[SAIFUDEEN C .K]

putting  OS to permissive mode worked for me

[fedor.solovev]

Wow.. After 12 years since the post was created...
CUC11.0 to CUC14 upgrade.

it requires the file ciscocm.enable-sha512sum-2021-signing-key-v1.0.cop
I tried fileZilla and FTP. It failed with MD5 check.
How bad connection should be to damage 0.05MB file ?

Then I tried old school WinSCP and SFTP - and it worked