Hi micman
I need much mor details about your issue. Fist i notice that this error code (2147483648) doesn't seem a error code but, like the error box says, you might have wired a number that is not an error. In fact this number also represents the maximum number of interactions that a loop cycle can reach. Therefore i ask you if you can relate this comment with your issue. I suggest you to check the error wiring throw the program and to perform a debugging procedure to locate the critical point in during vi running.
regards
Matteo