800XA 6.1 insufficient memory to restore 5.1 full backup
Can you provide more data?
Use Windows Performance Monitor to deploy a Counter Log to monitor AfwConfigWizard.exe's [Private + Virtual Bytes] during restore?
Unfortunately, it is indeed possible to end up with a larger system than what a backup (actually the restore process) can cope with.
The backup could potentially be corrupt (did you perform consistency check & clear the errors in 5.1 before backing up)?
The destination system (where you restore) could potentially be deployed incorrectly leading to memory growth.
Please contact your regional ABB Support Center for advise