Stuffit Expander says "the structure of the archive is damaged"

I downloaded G4TW's versions of In to the Future, Movie Stuff and University Life. When I try to extract In to the Future and Movie Stuff it says "the structure of the archive is damaged" and when I try and do the same to University Life it says "The StuffIt Engine was unable to determine the file format." 


Has anyone else had these issues? 

Hello there, 

I use StuffIt Expander too and the expansions extracted with no problems. The only reason I can think of now is that your download may not be complete. You can try re-downloading one of the expansions and try extracting again.

Let us know how that goes!

Thank you  I'll try re downloading the EPs and see if that works. 

I'll let you know how I get on.

Great! Do update us