When I'm writing a program to get waveform from the oscilloscope continuesly, a strange problem occurs. It offten happens at the begining of the program. One of the GPIBREAD nodes gives no responce: no error, no data.it wait until the global timeout runs out. The instrument stops responding at the same time. I have to stop the program, shut down the whole LABVIEW program and give the oscilloscope another command like "*IDN?" to make it work again. Sometimes the program works well, and if it started normally, the problem never happens until I stop it. The problem is more likely to occur when I stop and start the program without restart LABVIEW. It is really a strange problem, and I've been working with it for a whole day. The attached is my program. Thanks.
