Universal Robots Forum

Reoccurring “No controller” errors

Software version : 5.10.0
Robot generation : E-Series (UR10e)

Steps to reproduce : We can’t reproduce it 100% of the time but the error seems to happen when you’re holding the button to move the robot to the program starting position on the tablet whilst simultaneously holding the 3PE button.

Expected behavior : The robot stops when you let go of the 3PE while moving.

Actual behavior : The robot produces the “No controller” error if you let go of the 3PE “at the right moment”.

Hi @dominik.schwaiger,

Thank you for the feedback. If you see any pattern in when “the right moment” occurs please let us know!


I observed same error, but in different scenario here. Updated from 5.9.x to 5.10.1 last week and observered several “No Controller” issue since then.

Software version: 5.10.1
Robot generation: E-series (UR10e)

Steps to reproduce: Not 100 % reproducible, but it seems to happen after a pausing a program in my case. One scenario, in which the error occurs quite often is: Pause a program for about 5 min and stop the program. Go to Move Tab and turn the base or shoulder with the controls, haven’t tried to reproduce using the other joints

Expected behavior: Moving arm resp. continue program.

Actual behavior: The robot stops and shows “No Controller” (german: “Kein Controller”) in the bottom left of the screen . I have seen no error messages in the log, except “Polyscope controller disconnected” (german: Polyscope Vom Controller getrennt")