In SoMove why is "Compare Configurations" grayed out when working with an ATV630 or ATV930?

Issue:
In SoMove why is "Compare Configurations" grayed out when working with an ATV630 or ATV930?

Product Line:
Altivar Process Drives

Environment:
SoMove software

Cause:
Unable to compare configurations of Process Drives 

Resolution:
It's a known issue, comparing offline two .PSX files is not available for ATV6xx/9xx. This should be fixed in a future SoMove release. 
You can make online 'Load from Device and Compare' only, to compare already opened project with the drive