This model creates a table view, selects from the table view, calculates on the selection, then switches the selection. It is failing on the switch selection. The selection is correctly entered. Why is it claiming it can't open this table view? It makes absolutely no sense that it can select on the table view/calculate on the table view ... then lose the ability to access the table view. Any idea what's making the table view in accessible? The table view exists. I can open it in the table of contents. I can switch the selection in the table of contents. This table view exists and should remain accessible. Thank you for any help you may able to provide. Completely stumped.