[Cause]
The motion commands for the master and slave axes differ greatly. This alarm occurs when the absolute value of $DUAL_DRIVE[i].$CMD_GAP1[n] exceeds $DUAL_DRIVE[i].$CMD_GAPTOL1[n]. (i: group number, j: master axis number, n: dual-drive pair number)
[Countermeasure]
Check the mechanical unit for problems. Alternatively, if $DUAL_DRIVE[i].$CMD_GAPTOL1[n] is too small, readjust it to an appropriate value.