Aha! something new has been published on Technodivine .com: Utility Runtestset.Exe Not Working With ALM QC V11
Have you just migrated to Quality Center version 11 and now unable to use RunTestSet utility? Does your log file says “Error: Error: Class not registered”.
Here is the solution to get this resolved and get going with the test set execution once again.
Read Full article @ http://goo.gl/wU1yhU