Model is underconstrained.
The following variables couldn't be defined:
 * V in component membrane
 * i_Ca_L in component L_type_calcium_current
 * i_Ca_T in component T_type_calcium_current
 * i_K_DR in component voltage_sensitive_K_current
 * i_K_Ca in component Ca_activated_K_current
 * i_K_IR in component inward_rectifier_current
 * V_Ca in component L_type_calcium_current
 * m_L_infinity in component L_type_calcium_current_m_gate
 * tau_m_L in component L_type_calcium_current_m_gate
 * m_T_infinity in component T_type_calcium_current_m_gate
 * tau_m_T in component T_type_calcium_current_m_gate
 * h_T_infinity in component T_type_calcium_current_h_gate
 * V_K in component voltage_sensitive_K_current
 * n_infinity in component voltage_sensitive_K_current_n_gate
 * J_in in component cytosolic_calcium
 * J_eff in component cytosolic_calcium
 * d/dt V in component membrane
 * d/dt m_L in component L_type_calcium_current_m_gate
 * d/dt m_T in component T_type_calcium_current_m_gate
 * d/dt h_T in component T_type_calcium_current_h_gate
 * d/dt n in component voltage_sensitive_K_current_n_gate
 * d/dt Ca_i in component cytosolic_calcium