Error in Debugging screen of R+Task2.0 with SMARTIII

We are using R+Task2.0 on SMARTIII (CM-200).
When we monitoring Print out data in the Debugging screen of R+Task2.0, we get some error in the screen:

This error only print out sometime and there is no logical error in the task code.

Is anyone know what is the meaning of this error message?

It looked like that there was a disconnect in your BT-400 connection. Do you use BT-410 on the CM-200 controller? Does it have the same problem when using TASK 3?