Mag encoding not working with pass-through mag encoding commands on ZXP Series 8 printer

I am unable to encode to a mag stripe using the pass-through mag encoding commands on a ZXP Series 8 printer. However, the a ZXP Series 7 printer works fine.

Are the starting sentinel and ending sentinel still valid for ZXP 8 printer?

Example: ${2123450009881}$

Has anyone experienced a similar anomaly? The error that I get back is depicted in the following screenshot...

zxp8-mag-encoding.PNG

Any advice/insight that could be shared would be greatly appreciated.

Kind Regards,

-Derek