Looks like it's not pulling in the xml file to know what to compare it with.
Look inside SIMinstallDrive:\Program Files\HP\Systems Insight Manager\baselineData
Check if you see the referenced xml file in there. bp*.xml.. example the new spp should be bp002190.xml.
If not it's having issues pulling it from your Repository folder.
Go to options > Software Firmware > Version Control Repositlry > Click on the radio button until OK can be pressed. Then it should save again.
If that doesnt work, restart smh/vcrm and sim and do the same steps above.