Create 3 different configuration files, one for each project.
Make sure that all of your library paths (Steel, Pipe, Equipment) are pointed to the comment directory. Place ALL COMMON files in a READ ONLY directory so that only certain people can modify these files (this can be done by IT).
It will help if you name each configuration file uniquely (i.e. project number).
If you are using a database, make absolutely sure that everyone is using it. If you are using MS ACCESS with multiple users, then switch to SQL.
Regards,
Rod
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Rod Abbott , A.Sc.T.