You could have a corrupt batch file - do a Data Integrity check as I explained in my earlier response, follow those instructions and then (as I mentioned earlier) if that procedure doesn't help then ... make sure you have a good backup, then reinstall QCWIN by first removing the QCWIN program directory. Possibly something has occurred to damage some program files; reinstalling will put all program files back to their original state.

Do these procedures before you do anything else, please.

Good luck