Checklist

• I looked at https://github.com/PhoenixPE/PhoenixPE/wiki/FAQ to see if my question has already been answered.
• I performed a search in the issue tracker for similar issues using keywords relevant to my problem, such as the error message I got from the log.

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LetterSwap.au3

I misspelled one parameter and it took me hours to figure out why the tool is not working. It did not give me any useful info.
So i did some code correction and added error handling regards the parameter and recompiled it as command line version.

I put everything in here (updated Version):
LetterSwap.zip