Browse to ..\Mas90\Home\$ACTPVX.BAT. Right-click and choose Edit
Enter the correct System Activation Serial Number. Verify that only one space exists before and after the Serial Number Note: The serial number will be the block of characters following "-S" (for example, "-S 0123456 -K")
Verify the Unlocking / User Key is also correct. It will only be the first 18 digits beginning with a "P" (for example, -K P123456789012345678)
Save and close the file
Double-click the $Actpvx.bat to execute. A command prompt window opens with Echo off displaying on the screen with no additional messages. The system is now activated Note: Once activated, restart Sage 100 ERP and enter the correct serial number in Product Registration
Open File, Register. Select Registration, click Edit
Enter Registration Information, click Activate. click OK to Activation was successful windows
Exit Sage 100 ERP and re-enter to check for the error
NOTE:
If the above steps don’t resolve the issue and the system was previously working, restore the following folders from a backup:
..\MAS90\Home
..\MAS90\Launcher
..\MAS90\MAS_System
..\MAS90\SOA
..\MAS90\SY
TIP:
Migration renames the activation file (Activate.PVX) to prevent users from accessing the source during migration When the migration fails, the system doesn't automatically restore the file.