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UC - CER7.1- os admin sw upgrades -remote filesystem - FTP doesnt work?

Hello all,

i recently completed a UC 7.1.x upgrade for my customer  - CUCM, UnityCxn, CUPS and CER...upgraded to 8.6.x    For all servers...I used a local FTP server (filezilla) on my own pc to transfer various files including the ISO upgade images...to the servers during the upgrades....it worked fine for all servers except CER - version 7.1.1.30000-3..everytime i tried it would come back - "An unkown error occurred while accessing the upgrade file"  See below....is this a bug in CER7.1.x?      Once i upgraded the CER to 8.6.1..i retried OS admin sw installation/upgrade..and it would show any files in my ftp servers home directory.

I burned a disc...and upgraded CER 7.1.x to 8.6 and it was fine....i was just curious if this is a known issue?    

I didnt try SFTP.....i only had FTP available.

CER-os-admin-FTP-error-2.png

CER-os-admin-LOCAL-disc-install-2.png

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