Hi,all.
Am having difficulty getting my PRT alpha to run continuosly. I keep getting a pop up window saying: "Missing Comm Return. Hit OK to attempt to continue".

This message is usually being triggered after a part has run and command so,1,0 is used before it moves to another location. To make things more frustrating it doen't do it all the time, I can restart and run the same part again and will be fine, sometimes!!

Wondering if it is to do with the serial to USB adapter converting??? Has anyone else had this problem??? Is it possible to run the alpha control box on a serial cable from the computer thus bypassing the converter all together???