access violation

This is a challenge ! Can't find the reason I get this error. It happens on
the statement "MyDataset.Last". The program simply exits to Winfows.
Executing it in the IDE, it gives the complicated message ".. access
violation at xxxx; read of address..".
MyDataset is the name for a TTable component and it exists, since if I
introduce a test like " if MyDataset.Active then ..." this statement is
executed with no problems.
I can give more information if needed. Now I jsut see if anybody reach for
the challenge..
Franco


.

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