How best to rename many text files with 1st line of text?

Thanks so much Peter for you great suggestions!

This is my first attempt at the macro.

My current problem is the try / catch is not working as expected.

I expected the if the file already exists (error) then it would execute the catch which would add the random and timetag unique text and save ok. but it does not - I get the error:

File action failed because destination already exists…

Any Idea how to get this working so the file will save simply and add the unique text only if needed?

Rename-txt-files-using-first-line-of-each-file-mod1-mpu-v001.kmmacros (7.8 KB)