Error message with creation of project from old file set

Hello there,

I'm working with a large set of files that was never a project.
I've converted it into a project successfully, albeit a number of errors that I get when loading the project file, which all say:

charset: error -1 converting character encodings

I'd imagine that this means there are files in the pool of sub-directories that can't be read due to legacy issues.

Is there any way that I can go about finding which files (or situations) this pertains to?
I've tried double-clicking the errors to no avail.

Thanks much!
jml