I followed a tutorial on meshing the used milkshape and simpe. When I went to replace the GMDC with the edited version I keep getting an error message after I allow it to reload. The message says something like this:

Error while trying to open
Package: C:/Users/My name/Desktop/Tutorial dress files/TutorialDress_Meshfile.package
File: Geometric Data Container- (A series of letters and numbers)

Any reason why?