>In my application one of the method in a form is using the tables directly. I did open the table in a different alias and sets the buffer mode to 5. But when I made the executable and ran two instances of the same form, the first one is working OK but the second instance became frozen until the first one is closed. Why that happens? any idea?
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>Any help will be appreciated..

Sounds like you are not using private datasessions on your forms - so they are trying to use the same instance of the table.