I am having a problem when a referenced tlb file is being used to call forth a window which contains a ultrawingrid, each time the showdialogue call is made for that window, the last event that fires before I get an error is the grid.initializelayout event(and method), then as soon as it comes out of the method, it generates the error, which is ArithmaticException, Overflow or underflow in the arithmetic operation This then lets me continue, but grid has a big red x across it, then if i reload the second time the same form from a similar call, i get the window opening normally, no problem....almost like some of the grids properties had not been instantiated the first time. ANyone can help with this please...