Hi Peter,

As the problem is duplicatable with a copy of their data at your office, and sample data is clean, then I suspect that the problem is particular within the data.

When an item is created or edited, a number of other data files need to be loaded, including the Control Account Set file (otherwise known as the IC Acct file). Editing an item needs to create the account set list in a drop-down field. Perhaps there is a problem with this file? Or a temporary file related to the Control Account Sets?

If you have more than one Account Set, does the item editing errors occur in all items or perhaps just those that belong to a particular Account Set?

One possibility may be the existance of a data file ICACTT'I.DAT, which you could try renaming. A second Adagio Inventory user recently reported a similar issue and the above did not happen to help for them.