3d Core, Error: Unknown function or operator

Hello,

I have modeled a 3d core with a coil and the coil I have declared Muti-turn coil.
And in the simulation I have the following error:

Unknown function or operator
Name: mod1.mf.mtcd1.intp_edge
Feature: Stationary Slover 1 (soll/s1)
Error: Unknown function or operator