Berthil

Thanx for triing. The problem is solved with help from NI. I upgraded labview2009 to labview2009SP1, but I didn't install the newest drivers. The NiVisa 4.5.1 was causing the problem. Even MAX was giving problems and wasn't showing the ports on my computers. I upgraded the NiVisa driver to 4.6.2 and cleaned the corrupted MAX database and the problem was solved on the computers where I had the problem.

When I'm opening a vi with a visa resource name control on the frontpanel Labview crashes. Does anybody have the same problem? It is easy to check, take a blank vi put "Visa Configure Serial Port.vi" and create a control on the vias resource name or try to open "Visa Configure Serial Port.vi" Greetings Berthil