Hello everyone,

I am a begginner in Allplan Visual Scripting and I have a problem for changing the diameter of the reinforcement bars.
When I link the "BarDiameterComboBox" to "LongitudinalBar" to enter a diameter, the message "Failed to update value from palette. Exception message: Object reference not set to an instance of an object." appearing (Picture 1). And then I can't create the object in Allplan (Picture 2).

Does anyone have a solution to this problem?

Thanks in advance