Name error : name 'Sys' is not defined.

This issue seems to be getting reported across several threads here now. It appears to be as a result of updating to the newest version of TestComplete. There is an issue with calling Python Scripts. Current advice is to downgrade to 15.76 and run from there. There are open tickets recorded for this issue and SmartBear seems to be working on it. All we can do is hope that the process is speedy. Be sure to update the thread here if my suggestion does not work. This could signal a larger issue with TestComplete.