Check to See if an Active Refnum Exists

[diarmaede]

Hey All,

Gumby question today.  I want have written code that opens a data log file when the "Log" button is clicked.  Now I want to add code that, under certain circumstances, checks to see if a data log file exists.  If it exists, I will close it before opening a new one.

My first thought is to check to see if an active Refnum exists.  If so, I would close the associated file before opening a new one.  Is this the right way to go?  If so, how do I set up a check to see if an active refnum exists?

Many thanks.

[altenbach]

Simply check if the file exist. There is a tool in the advanced file io palette.

(Your idea is flawed because a file can exist even without an active reference)