Model is unsuitably constrained (i.e. there were still some variables left to be computed, and some unusable equations left over). At the time of the error, the following variables were found: * Undefined: v in component gating_Ik1 * Undefined: alpha_act in component gating_Ik1 * Undefined: beta_act in component gating_Ik1 * Undefined: x_inf_act_Ik1 in component gating_Ik1 * Undefined: var_2 in component gating_Ik1 * Undefined: var_3 in component gating_Ik1 * Undefined: var_4 in component gating_Ik1 * Undefined: var_5 in component gating_Ik1 * Undefined: var_6 in component gating_Ik1 The following equations couldn't be used: * Equation with no id on the apply or math element. * Equation with no id on the apply or math element. * Equation with no id on the apply or math element.