>I have a form, ... before it unloads or destroys itself, an error message >
>

Cannot access table

It seems as if You are manually closing a table too early. The error
often is caused by grids who's RecordSource has been taken away.

You can avoid this either by not closing tables, lets say, before
the unload event.

Resetting the Grid's RecordSource, e.g. in the queryUnload, also should do the deal
Do something like

This.pgf1.page1.Grdi1.RecordSource = ""
...

HTH