Error Code 9 with MOTION CONTROL (Message 11)

[JPSeeland]

Hello,
when using the motion control message from chapter 3.7 manual robot control, the C3 Bridge always returns:
"sending answer: tag 128, type 11, size 4, error code 9 [FAILURE]"

To try to avoid any mistakes while sending, i also send the example request, but got the same error.

Do I need to be in a special mode or do I need to configure something, to be able to send the motion command and let the robot move without a program looping over a variable?

I can provide the code if needed.
Thanks!