ID 21720
| #OPTIONAL EXECUTION was not set to ON on this current program level. | |||
| Description | If #OPTIONAL EXECUTION OFF is programmed, the program detects that no corresponding #OPTIONAL EXECUTION ON was set on the same program level. | ||
| Response | Class | 2 | Abort NC program processing. | 
| Solution | Class | 3 | Check the programming of #OPTIONAL EXECUTION ON/OFF. Paired selection/deselection may only be set on the same program level. | 
| Error type | 1, Error message from NC program. | ||
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