strange servo K6K error

[lion 0]

Recently customer feedback a question: machine in run suddenly stop.I upload fault project and researched program,in R03_Registration I found that the MOTION_INSTRUCTION of MAR instruction has one error 11. error 11 detail: At least one axis is not configured to a physical motion module or has not been assigned to a Motion Group. Axis Not ConfiguredFor a motion coordinated instruction, look at the extended error code (EXERR). It identifies which axis caused the error.Example: If EXERR is zero, check the axis for dimension zero. Servo Message Failure this MAR instruction is about one auxiliary axis,it is one external encoder,locate in the first Master AXIS module OTHER about motion instruction also have error 11.I think these error is the result or error 12. error 11 detail : Messaging to the servo module failed. I think above question maybe caused by no shield encode cable and other disturb.I hope to listen the point of other friends.