Occasionally my code crashes when I test if sys.desktop.ActiveWindow.exists because "Cannot find the window with handle xxxxx".
The line immediately before the condition is sys.Refresh so I would have to be extremely unlucky for my object to be destroyed in the milliseconds since the refresh but it keeps happening.
Ho do I test this? Do I need to use isnull(sys.Desktop.ActiveWindow) instead?
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I ended up using aqobject.issupported(myObj, "Exists") instead but thanks.
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Try using one of these Wait methods