HFSS: Magnetic Bias only be assigned to Ferrite 3D objects

Hello everyone,
I've tried to simulate the effect of current running through an copper strip in HFSS to investigate the gradient effect on a surrounding static magnetic field.
The problem at hand is to create this magnetic field. So what I've tried so far is the draw a cylinder (3D) made of ferrite and excite this with a magnetic bias as if a permanent magnet. Unfortunate HFSS (ver.12.1) responds with an error message;
Magnetic Bias only be assigned to Ferrite 3D objects

Can anyone help me how to solve the matter.

Thanks in advance

John

Are you sure you have set all the gyromagetic properties for the ferrite, e.g, saturation magneticzation, Er, line width....

Looks like the error only happens when you attempt to set the magnetic bias for an un-ferrite material.