Error: Invalid argument to date encode

Good morning,

When I drag certain files in order to have them renamed I get an error saying "Invalid argument to date encode" and it never finishes analyzing them.

The strange thing is that I am not doing anything related to dates. I am just changing all names to low case.

I am using Advanced Renamer 3.87 on a 32-bit Windows 7. It works perfectly with the rest of files.

Any suggestions? Thanks!