Windows 7 sequentially numbered file extensions

M51

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May 15, 2014
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I have a program that I cannot edit that produces files with sequentially numbered file extensions *.o### (ie, *.o641, *o.642, etc.). These files are just text files that I would like to open with Notepad++, however Windows does not recognize them and so I have to go through the entire, "Select a program..." nonsense for every single new run of the program.

I tried using the windows command prompt "assoc.o641=.txt", but this only works for a single file and thus is just as cumbersome as the "select a program" routine. assoc .o***-.txt does not work, assoc .o*=.txt does not work, and I can't figure out how to get a FOR loop to do it for all numbers 000-999.

Does anyone know of a way to fix this so that any file with the extension *.o### opens automatically in Notepad++?

Thanks
 
If you're familiar with the command prompt, then you could try:

Code:
ren *.o* *.*.txt

That should rename all files of the type *.o123, *.o234, etc... to end in .txt, so you can open them in Notepad++

Just a caveat... please only run that command if it makes sense and you are familiar with the command prompt, as it will bulk change filenames in that directory.
 
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