"Title" field in Summary tab (windows explorer)

I am trying to add some info on the "Title" field on Summary tab in Windows Explorer but I am getting an error.

"Unspecified error"


I would like to put the same descripiton that I have in Custom Properties so it will show up in the Detail view in Windows Explorer.  Adding a Title to a standard text document works just fine, not sure why im having issues with a SolidWorks document.

SolidworksParts And Features