>Thanks for the suggestion. I open the tables in the DE. I don't remember about the Data Session. When I try to Save the newly created record I get a 'Selected Alias' error in the TableUpdate(.f.,.f.,'Invoice') - according to the Debugger.

Very strange. After you are finished your debugging, please post the solution in case anyone else runs into this problem.

Switching to Private Datasessions makes life much easier. Fewer things to worry about, and less interference from other open forms.