# ID 120407

Unknown function block.
Description | The received function block is not valid in the current state of tool geometry compensation. Only linear blocks are permitted in the selected state of TGC.
Response | Class | 2 | Abort NC program.
Solution | Class | 3 | Check selection and deselection of TGC.
Parameter | %1: | NC block number [-]
| Internal state of tool geometry compensation
Error type | 1, Error message from NC program.