VI connects to the file but empty the file when collapsed

I have a VI that creates colum headdings and then updates the rows with data every second, if I open the file during the execution VI all my data is there but if I stop the VI then open the file only my headdings colum are there.

I guess that is not complete or save the file when the program stops, but I can not understand.

Any ideas - I've attached a photo...

I wish I had known you were using this as a Subvi because now your problem is logical. You have a fundamental misunderstanding of LabVIEW and data flow. Because you used controls and not the references, in the Subvi controls are updated only when your main VI calls this Subvi. The values remain the same until the Subvi is stopped and recalled by hand.

It would be better to have your Subvi simply writing data - no loop or anything else. The second 1 loop in your hand as a single instance of the creation of the header.

Tags: NI Software

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