Does the user have full control permissions for this shared folder?
To ensure they have the proper permissions see if you can create, edit, and delete a text file in this folder.
A few other questions I have are:
+>Are any users able to open the database from this folder successfully?
+>Does anyone else have the file open when the user receives this error?
+>If you copy and paste the file into this folder and try and open the copied file, do you receive an error?
+>What happens if you copy the file to a different folder and try and open it from there?
+>Does this database have any linked tables in it that are located in another database?
If so, does this user have proper permissions to the folder that database is stored in?
+>Does this database have user level security implemented on it?
By this I mean do users have to type in a user name and password to open it?
Best Regards,
Nathan O.
Microsoft Online Community Support