Maybe, I found the problem ... in my test plan I use a Syncronizing Timer object. If I run this plan normally using only a PC all works correctly. When I try to start the test plan on a slave system using Remote start in the SyncTimer class the 68th row thrown a NullPointerExeption.
Infact if I disable the object and try to start the test .... all goes fine. Best Regards , Raffo

