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Write a custom probe for a VI Refnum type. In the diagram of that custom probe, put an Open FP method call. Then probe the wire coming out of your Open VI Reference call. If you have scripting knowledge, you can go further and have the custom probe open the panel and open the diagram and put a breakpoint on the top-level diagram, or some other point within the diagram of your choosing, so that when the VI actually gets called to run, it'll trip the breakpoint.

First, this last post is much easier to read than your other posts. You can improve it more by not using capital letters in random words and by using the spell checker before posting. Also, if you happen to have someone near you who speaks English, having them go over your posts would be good. If you're really serious about learning English, you should consider taking a course. As for LabVIEW, there's a version called the Student Edition which costs a lot less, but is only officially available in schools. If you're a recent student you can try getting it through your school or by talking directly to your local NI office (who might be willing to help). Another option is buying a Mindstorms NXT. I *think* that if you get that, you are entitled to get LabVIEW 7.1 for free (if you request it), but I'm not sure. There was a German computer magazine (CT) which should have LabVIEW 6.1 available on their site for free, but I believe it's only in German and only for Linux.

In the spirit of the Winter Olympics, I wanted to remind everyone of the greatest Australian winter olympian, if not the most beloved. This video shows the true Australian spirit:

Opening the front panels of the clones and then the block diagrams is most direct way to debug. The only other thing that I find helpful is to put the property node that opens the panel in a conditional disable structure and then create a DEBUG_REENTRANT flag that an be true or false (or mutiple flags for different circumstances). That wah, you can just modify the conditional symbols in the project when you need to debug and you don't have to make explicit code changes. I also have a utility that I use to debug reentrant VIs that runs a daemon in the background and a VI that enqueues messages for that daemon. I can drop the "send message" VI anywhere I want to see what's on a wire and when that wire carries data the message pops up on the daemon. Mark