When running a QTP script from QC 10 the script runs successfully, but the following error appears: Mdrv Error log extension: Cannot open Vuser log file C:\\Users\\mgseyer\\ApppData\\Local|Temp\\\\output.txt [Msgld:MERR-44999] have to hit ok before the script continues. Where does this come from? What can we do about it. This is from one of our users. Any information you may have would be appreciated.