Hagay,
When you specify the propcess model, the sequence name should reflect sequences available in the process model. Example "Single Pass" or "Test UUTs". If you use "MainSequence" it should just skip everything since the MainSequence in the process model is empty.
In Addition, this sounds more like a TestStand question rather than CVI, maybe next time you should post similar messages in the TestStand group.
Regards,
Roberto P.
Applications Engineer
National Instruments.