Open write and save a txt file

i'm trying make a vi to open and write in a txt file
my level of LabView is very basic and, i'm looking for help for open (or create) a txt file in a specfication folder, write a value and save this file in a another folder

you are not closing the the file in use, that is why you get the messege and your string format....
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Attachments:
vti[1].vi ‏11 KB

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Attachments:
Proba.vi ‏21 KB

Hi there,
May I suggest you start with the LabVIEW tutorial? Or perhaps this one?
I say that because 1) you said you're new at this, and these tutorials are great for getting started; and 2) you don't seem to understand the concept of dataflow.
A structure, such as a loop or subVI or function, cannot start executing until it has all of its inputs available. Therefore, the loop which contains your file write (bottom loop) cannot execute until your top loop is done executing, because it depends on inputs from your top loop and those inputs aren't available until the top loop is finished. Thus, your file will contain only the data from your final top loop execution. You might be thinking that your loops are executing in parallel. They are not. Your file loop is executing after your data loop has finished...that is to say, your file loop executes exactly once, after you press your stop button.
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One other thing. Move the "open file" function outside the loop. Opening and closing the file in each loop iteration will cause problems. Open the file once. Write to it in each loop iteration. Close it when you're done. Like this:
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Open write and save a txt file

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