Having an issue upgrading Unity Connection from 10.5.2 to 14.
The first time I tried I got the error "an unknown error occurred while accessing the upgrade file"
I tried again after rebooting and got the error "premature end of file"
I thought maybe that the file was corrupted so I re-downloaded it and tried again.
Again I got the "an unknown error occurred while accessing the upgrade file"
I looked through the install log and found an error in there "<subscriber ip> must have the primary server state for exporting of CUC data to succeed"
So I made sure that the subscriber was primary before starting. this last one said there were no error messages.
Attached are the install logs.
Please rate if this helps.