Upgrading to 7.2

We are upgrading form 6.12 to 7.2. On our test server, we upgraded from 6.12 to 7.0 then to 7.1. When upgrading to 7.2, the simulation gives us the error in the attached doc.

Any suggestions as to what might be causing the problem?

Hi Bernie,

I had this exact error when upgrading from 7.1 to 7.2 in October so I contacted support and they said this:
"This is a common issue with simulation's when the DB is on a different server. This could be an issue with the service credentials you've entered for the upgrade if it does not have permission to access, read, and write to the location where the backup is. Also, sometimes DB user mappings aren't always created for the simulation when the DB is external. They easiest way around this error is to ensure you have a complete DB backup and do not run the simulation. "