Hi all, Hurray, the I/O Assistant does work. Thanks to your various help.
My HPIB gear responds in GPIB I/O Assistant. I also see a working I/O Block Diagram now. Besides, the driver for my TEK DSA602 seems to work too ( as LabView Instrument vi ). I realize that I have a long long way to go, BUT I made a start ! Thanks for your extensive help again. I am afraid :-) I will be back soon and often here... you don't mind ? Peter.