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Hello, Am working on modelling axial flux motor with coreless stator via spiral planar coil, however, using coil type circular works but the obtained magnetic flux density is in milli tesla. using numeric, give rise to below error. Your suggetstion on how to deal with the error is welcome

Attempt to evaluate negative power of zero. - Function: ^ Failed to evaluate temporary symbolic derivative variable. - Variable: mod1.rmm.coil4.ccc1.normg@VDN$2mod1.rmm.coil4.ccc1.pYm.internal - Defined as: ((-exp((-i)phase))(2mod1.rmm.coil4.ccc1.gY))(0.5((((mod1.rmm.coil4.ccc1.gX^2)+(mod1.rmm.coil4.ccc1.gY^2))+(mod1.rmm.coil4.ccc1.gZ^2))^(-0.5))) Failed to evaluate expression. - Expression: ((-exp((-i)phase))(2mod1.rmm.coil4.ccc1.gY))(0.5((((mod1.rmm.coil4.ccc1.gX^2)+(mod1.rmm.coil4.ccc1.gY^2))+(mod1.rmm.coil4.ccc1.gZ^2))^(-0.5))) Failed to evaluate Jacobian of expression. - Expression: eps+mod1.rmm.coil4.ccc1.normg Failed to evaluate Jacobian of expression. - Expression: (mod1.rmm.coil4.ccc1.S-(mod1.rmm.coil4.intmtcd(eps+mod1.rmm.coil4.ccc1.normg)/(eps+(mod1.rmm.coil4.ccc1.normgmod1.rmm.coil4.ccc1.Vdom))))dvol Failed to evaluate Jacobian of expression. - Expression: (mod1.rmm.coil4.ccc1.weak1)*(dvol)