topic Re: Call Library Function Node 0x0 in LabVIEW

Call Library Function Node 0x0

brianpham999 — Tue, 25 Jul 2006 05:13:29 GMT

Hi everybody:

Could you please help me out with this problem?

My program works fine, but It runs about 2 minutes and gives me an error. Please see the attached codes and error message.

Thank you so much for your help and have a good night.

Brian

Re: Call Library Function Node 0x0

tbd — Tue, 25 Jul 2006 08:35:40 GMT

Hi Brian,

I can't open your VI (LV 7.1 here) though it's very easy to get into trouble with CLF - assuming that's the problem, first thing to do is locate the called-function's prototype, and review/compare it to the prototype shown in the CLF dialog. You'll want the two prototypes to match byte-for-byte. If I had $5 for every time I crashed LabVIEW while using CLF, I could afford LV8.0.

Cheers.

Re: Call Library Function Node 0x0

chrisger — Tue, 25 Jul 2006 13:32:34 GMT

hi there

add a "DAQmx Clear task.vi" to the AI Voltage task. you only stop the task, but you should also clear it.

btw: why do you reopen this AI task in each cycle? this will lead to an enormous overhead. if you want to change the AI channels at run time try to use a event structure.

Re: Call Library Function Node 0x0

brianpham999 — Wed, 26 Jul 2006 05:16:04 GMT

Hi Chris:

I would like to thank you so much for your advice. My program works well now.

Have a good night.

Brian