>I have a form that has a grid on it. When the form loads, the grid is filled with the appropriate data from a file. I have an option that allows for the datafile source to be changed. When it is selected, I need the grid to change to the new data. It appears to be working except the grid turns into a large white box with no data, lines, columns or rows. If I exit the form and reenter... the newly selected data is now visible.
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>I have tried thisform.grid1.refresh and that doesn't work. Any suggestions?

See faq#8019 Grid reconstruction and how to avoid it.