But when I run this LabVIEW program, there is always a 200279 error. I studied this error and found out that because I am trying to write file in the same loop which I am acquiring data, and the write to measurement file Express VI takes a lot time to open the file, write to it and then close it. Because of it, there comes the 200279 error.

The solution is either using basic file I/O functions to open the data file before the loop and close the file after the loop and write file in the loop or using a producer/consumer architecture to move the write file VI into another loop and transport data through queue between these loops.

At last, I created another loop and moved the write file VI into it. And after I changed the LabVIEW program’s architecture, there is no more 200279 error. It’s better not put other VIs in the DAQ loop.

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