# ID 20465

Master axis not available as path axis.
Description | With selection or deselection of synchronous operation, it is detected that one of the defined master axis is not available in the NC channel. The test is also executed during the automatic restoration of axle couplings (P-CHAN-00104, P-CHAN-00105) and during the deselection of transformations.

For further information see [PROG// Section: Synchronous operation]

Response | Class | 2 | Abort NC program processing.
Solution | Class | 3 | Check and modify NC program. Ensure that the master axis is available in the NC channel before selecting or deselecting synchronous operation. Possibly check axes exchange commands used before.
Parameter | %1: | Logical axis number [-]
Axis number of the missing master axis
Error type | 1, Error message from NC program.