GCODE generated by Fusion 360 for GRBL sending error 33 on G3 command

[tkms002]

Trying to do a rather detailed 3D lion face.  After generating the GCODE using fusion 360 and GRBL post it runs fine in simulator mode but I get this error when running it in check mode on UGS.

{Error} An error was detected while sending 'G3X1.546Y-0.4092Z-0.9575I-0.011J-0.0006'

It did check OK on a number of previous G3 commands.

What am I doing wrong?

Thanks

[ltomuta]

Looks like the solution to your problem may be given by @AmandaFowler here.