If the error shows the name of an axis, the CNC did not complete the reading of that axis feedback. If the error does not show the name of any axis, the CNC did not complete the cyclic refresh of the counters. The error may be due to an error at the CAN bus, to a counting (feedback reading) failure, in the feedback module or due to the saturation of the CAN bus.

Check the connection and configuration of the CAN bus, the counter module or increase the LOOPTIME if the bus is saturated.