: Error 7003 means the the library has timed out when looking for your device. Since the program has already successfully run once, chances are LabVIEW is holding on to something after your program has been run. Try running Reset All.vi under the Phidgets->Phidget Common palette after running the program, then run your program again.
For more information, check the Common Problems section of the LabVIEW language page here: https://www.phidgets.com/docs/Language_-_LabVIEW#Common_Problems.2C_Solutions_and_Workarounds
All Phidgets error codes in LabVIEW are offset by 7000 to avoid conflicting with LabVIEW's own error codes. In this case, error 7003 is equivalent to error code 3 in our other supported languages. You can get the description of a Phidgets error code by using Phidgets->Phidget Common->ErrorHandler.vi