How can I check if a file is opened?

Question

Hello,
I have a problem:
I want to check if a file is existing or not, and if it exists, I want to check if it is opened.
The following actions should be taken:
1. File exists => no error message, everything's ok
2. File does not exist => NO error message, create the file later 
3. File exists but it is opened => notify user (Ok message)
4. path does not exist => notify user (Ok message)
How can I do that? I have problems to check if the file is opened.
This is what I have done until now:
Johannes
LabVIEW 7.1 (!)
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently

Answer 1

The error checking method is probably the best, most efficient, and cleanest way to do this (only one case structure needed). But here is a somewhat more "rube goldberg" way that does do the job thinking somewhat linearly. If the directory doesn't exist, then the file won't exist. If the file doesn't exist, then it can't be open. So first you check if the directory exists, if it does, check if the file exists, if it does check if it's open. Not a fan of these nested case structures really, but it is a way to do it.
Message Edited by for(imstuck) on 10-29-2009 07:56 AM
CLA, LabVIEW Versions 2010-2013
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