[Cause]
The tracking parameters used in the procedure are assigned an illegal tracking area number (boundary range numbering) in the tracking parameter setting table or in the tracking instruction.
[Countermeasure]
Check the value of system variable $LNSCH[n].$SEL_BOUND (n is the tracking parameter setup table number, an item on the tracking program detail interface) and the parameter value of tracking instruction BOUND[], and ensure that they are within the valid range (integers from 1 to 3).