How do I prevent the "Could Not Find" error message from del *.txt?

Question

if exist *.txt del *.txt

If you want to suppress all error messages, you can do this:

del *.txt 2>NUL

surround with an if exists...

or use a different delete utility {like 'rm' from the mks tools}

or take a look at forfiles.exe - that should do what you need.