Thanks, in an attempt to increase clarity of my issue, let me try and elaborate. The database works fine on my primary computer. I'm trying to network the database with one other computer, so that 2 can use it simultaneously. Hence, I split the database using the included access tools. Front end, backend, etc. I can place random files (word, whatever) in a shared network folder and they function fine. Database, no. It was suggested that the access program version on computer #2 might not be compatible with the database. So, I tried to run a working database copy on #2 and lo and behold, it would not open the tables. Could the program be corrupted? So I have since (with some difficulty) un-installed Access and tomorrow I'll try and find a non "click to run" version to install and try again. Again, the database works fine on computer #1. So, hoping Access on #2 was just corrupted somehow. Much too easy of course. But who knows. Other than the shadow, perhaps I will tomorrow. Thanks!