Hi Steve, Thanks a lot for the very clear procedures :D
As I am using valueProviders, so I thought the 'updateWidgets()' would do the trigger but it doesn't. Now, after I've inserted 'set_value()' to place some garbage values into those knobs and then call 'updateWidgets()', it works beautifully. So I guess these 2 calls are paired in a way. Best, Mike
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