I'm trying to change the stats of Revan's White Robes that I downloaded.

When I try to open it with Kotor Tools it says the "file has no embedded version info. Do you want to open in using KOTOR 1's data?"

If I say yes then I get the error "An unhandled exception has occured in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will shutdown immediately. Cast from string "ERROR" to type 'Integer' is not valid."

Anyone know whats causing this?

I can edit other .uti files with Kotor Tools.

Some files have been created by modders with values outside of what the KotOR game engine allows by default, which is strictly followed by Kotor Tool. As a result, some files cannot be opened by Kotor Tool; use the K-GFF editor instead.

They were made with a GFF Editor during the early days, you will have to edit them with one. ;)