Hi Benio,
There is nothing wrong with the Event structure. Well, except that for the timeout event you need to set a time because otherwise the event never fires.
I've tried your structure and replaced your instrument driver VIs with other VIs for another GPIB instrument but also with an Initialize function, Selftest,... . I even kept the Write VISA string in the quit case. Everything works fine with my instrument. I checked our Instrument driver website but this doesn't seem to be one of our drivers?? I don't know where you got it from but I would contact that provider. I have found a discussion forum link where a customer has posted another driver onto the web maybe this one is better but ofcourse we cannot support that. Please check the link below:
http://forums.ni.com/ni/board/message?board.id=170&message.id=108283&requireLogin=False
or this one:
http://forums.ni.com/ni/board/message?board.id=170&message.id=18840&requireLogin=False
You should test your program without the event structure first. Just link the VIs together and probably that will not work since I don't think that the Event structure is an issue here.
Regards.
JorisV
AE
NI Belgium