Writing to a file and Reading from it "AT THE SAME TIME"

Hello,
If you have a vi (vi 1) that is generating and storing data to a file. Is it possible to write ANOTHER vi (vi 2) that reads & plots the data located at the same file (BTW, vi 1 will still store data to the file while vi 2 is reading the data)
All I am trying to do is to plot data that is generated from a different vi (vi 1) somewhat in "real time". Unfortunately, I cannot access the vi (vi 1) that is generating the data and add a diagram to it. I have to build my own separate vi (vi 2). Is this possible?
Thanks in advance

Once you open the file, you can't access it again until the original reference is closed. You might want to look at a functional global architecture. You use a case structure to determine how to access the data. Initialize, write, read, save are common examples of sections inside the functional global.
http://zone.ni.com/devzone/conceptd.nsf/webmain/D2E196C7416F373A862568690074C759

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Writing to a file and Reading from it "AT THE SAME TIME"

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