ID 21719
| #OPTIONAL EXECUTION has to be set to OFF before program end. | |||
| Description | The end identifier #OPTIONAL EXECUTION OFF is not set for a sequence to be masked in forward/backward motion up to the end of the main program or subroutine. | ||
| Response | Class | 2 | Abort NC program processing. | 
| Solution | Class | 3 | #OPTIONAL EXECUTION must be set to OFF before the end of the main program or subroutine. | 
| Error type | 1, Error message from NC program. | ||
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