>>Hmmmm. Toughie. Is RThreshold on both controls set to 1 or greater? Are you sure that data is available on both ports? Is there any other code running after the first (last?) port responds? Grasping here...
>>
>>>Exactly the same. No working
>Here is code (INKEY(0.1)) I have added to the first INIT
>INKEY(0.1)
>This.portOpen = .t.
>
>helped big time.

Really? "first INIT" ... whose INIT?