Yaskawa MotionWorks IEC - Manual (Page 249)

PLCopenPlus Function Blocks for Motion Control 2013-04-13 241
4625 Axis ID does not correspond to an axis configured on the
system. Verify the value of AxisNum matches a logical axis
number in the configuration. Tip: Make sure AXIS_REF is
properly declared as a VAR or VAR_GLOBAL in all relevant
POUs.
4660 Deceleration is less than or equal to zero.
4893 The specified external axis may not be used. A physical axis is
required
57620 The structure size does not match.