Okuma Alarm-B 2570 W-axis position condition

Okuma Alarm-B 2570 W-axis position condition
G154 command was specified without designation of W-axis command.

Code
1->G154 command was specified without designation of W-axis command.
2->G154 command was performed by the side of the 2nd spindle.
3->At the time that thg command of “Sequence carriage return” to block in excess of G154-command was performed, the actual-position of W-axis differed from the movement target position of W-axis.

Probable Faulty Locations
1)Programming error
Program example:

N010 G154

Measures to Take
1)Review the G154 command block.

N010 G154 W100