Error-200279 when reading Analog Wfm Nsample

[KowdTek]

I'm calling the attached VI at least 10x in the main VI and works fine but sometimes it's giving me an error-200279. Can someone please tell me why?

Thank you in advance.

[RavensFan · Accepted solution]

Your buffer isn't big enough.

You are collecting 20,000 samples per second, but only set it for 2000 samples per channel.  So that is 1/10 second worth of data.  You are reading 1000 samples at a time, so about 1/20th second.  If the loop is running fast enough, you can keep up and won't get an error.

If there is a small delay (perhaps Windows goes off and does something else for 50 or 100 msec.) your buffer will overflow.

I'd suggest eliminating the 2000 constant where you set the samples/channel and try again.  See if it behaves better.

[KowdTek]

Thanks RavensFan! It works better now..