>Epilogue: Assign problem.
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>Ok, folks, here's the end result. I defined another property for the application object (Custom class) with a default value of 0. I created an Assign for that. It worked. I got rid of the Assign that wasn't working on the logical type property. Then I added the Assign again. Both Assigns worked. Got rid of the numeric property and the other Assign still worked.
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>Now everything works the way it was supposed to. I tried to create a new app object with a new property and property_assign to duplicate the original problem to help create a KB for Garrett. Could not duplicate it.
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>Now this is not the first time I have had a run-in with an Assign. I have never gotten a Value_Assign on a Checkbox (also logical) to work as well.
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>Thanks for everybody's advice on this and, I guess, the original problem remains a mystery.

Gonz,

Just out of curiousity here, how was the logical value being assigned? Were you using a literal (ie: This.lLogical = .T.) or was it being done by and expression (This.lLogical = (some expression = some_other expression).