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Randomly get open file dialog even though the file exists

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I've been using this vi to write error information to a log for months at this file path C:\LabVIEW Working Folder\Tester Software\Config and Log Files\Error Log.txt and as an executable at this file path

C:\LabVIEW Working Folder\Tester Software\data\Error Log.txt 

Now for some unknown reason randomly but usually on the close i get a file dialog box asking which file to write... 

Any idea what I'm missing... what stupid mistake did I make? It just doesn't make sense...



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  • 1 month later...

Are you sure there's no race condition of some sort? Calling this VI parallel with another instance of it? Though it would mean that you set it reentrant and I think it would throw file permission errors, but at first glance I don't see other problems.

Another idea is that your wiring is wrong but fooling you: you have a junction of file_handle and error before the case structure, and the close VI is not after the case but parallel (sometimes before).

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