OK try this. Get everyone out of Adagio Inventory, and in the \softrak\icwin directory where the Adagio Inventory program is installed, look for a file ICMNURES.RSC. It should be updated every time someone opens the program. Once in a blue moon during product development, I have seen it not be updated and when new menu choices are created, they don't appear in the security groups list. The problem appears as a checkbox and a missing text label when editing the security group.
If this is the problem, all you have to do is delete this file, and the next time you open Inventory, it will be recreated with the security group listing refreshed. This will not affect your data in any way.
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Regards,
Softrak Tech Support