I found article ID 213983,
http://support.microsoft.com/default...b;en-us;213983, that finally
answers my question why I sometimes can't open files. This has been a great
mystery to me because I can open the files if I copy them to my local hard
drive. Unfortunately, for a lot of reasons, I can't rename the directories
or files. Is there any way to get around the 218 character limit? Is this
limit carried in later Excel versions?