If you do an upgrade from ver 7 to 8 and after copying all the dat files to the version 8 install and you get access violations on trying to run any exe file in Rpro, look at the scale.dat file as a possible cause.

Chances are that there are scales that has no name to them. Open the scale.dat file with dvs and put a name in for the “nameless” scales and the error will disappear like mist before the warm African sun.