Never heard of a message with this Text. Can you provide exact Text and message number and message prefix, or share a screenshot. Does the message come from KSS or a Techpackage or is user defined or ...
Which robot of KUKA type? Whats the robots position when this happens. Is it happening always on the same spot inside your program? What is the robot doing? Is it using any techpackages? ...
Nothing abnormal happened? That's your interpretation. How do you know this? What did you checkout to verify nothing abnormal happened? Whats shown in logs for example? ...
I think we need a lot more details to be able to help. Let me put it into perspective: what you provided so far is meaningless. It's the same quality calling your car repair shop with only info the car stopped. Did you pull hand brake, ran out of gas, crashed, ... Limitless possibilities.
Fubini