Model is underconstrained.
The following variables couldn't be defined:
 * V in component plasma_membrane
 * i_K_dr in component delayed_rectifier_K_channel_current
 * i_K_ATP in component K_ATP_channel_current
 * i_Ca_f in component fast_Ca_channel_current
 * i_Ca_s in component slow_Ca_channel_current
 * i_NS in component non_selective_cation_channel_current
 * n_infinity in component delayed_rectifier_K_channel_current_n_gate
 * tau_n in component delayed_rectifier_K_channel_current_n_gate
 * I_infinity in component delayed_rectifier_K_channel_current_I_gate
 * O_K_ATP in component K_ATP_channel_current
 * MgADP_i in component K_ATP_channel_current
 * ADP3_i in component ATP_ADP_exchange
 * ATP4_i in component ATP_ADP_exchange
 * O_f in component fast_Ca_channel_current
 * k_plus_1 in component fast_Ca_channel_current
 * k_minus_1 in component fast_Ca_channel_current
 * k_plus_2 in component fast_Ca_channel_current
 * Ca_d in component fast_Ca_channel_current
 * O_infinity in component fast_Ca_channel_current
 * O_s in component slow_Ca_channel_current
 * J_infinity in component slow_Ca_channel_current_J_gate
 * tau_J in component slow_Ca_channel_current_J_gate
 * ATP_i in component cytosolic_ADP
 * glu in component cytosolic_ADP
 * J_hyd in component cytosolic_ADP
 * delta_J_hyd_ss in component cytosolic_ADP
 * Jp_gly in component cytosolic_ADP
 * delta_J_gly_total in component cytosolic_ADP
 * J_ANT in component ATP_ADP_exchange
 * J_uni in component Ca_uniporter
 * J_NaCa in component NaCa_exchanger
 * proton_motive_force in component mitochondrial_membrane
 * pH_i in component mitochondrial_membrane
 * pH_m in component mitochondrial_membrane
 * JH_leak in component proton_leak
 * JH_res in component proton_pump
 * JH_F1 in component F0_F1_ATPase
 * J_o in component proton_pump
 * A_res in component proton_pump
 * NAD_m in component mitochondrial_NADH
 * Jp_F1 in component F0_F1_ATPase
 * A_F1 in component F0_F1_ATPase
 * ATP_m_free in component F0_F1_ATPase
 * ADP_m_free in component F0_F1_ATPase
 * ATP_m in component mitochondrial_ADP
 * J_red in component mitochondrial_NADH
 * delta_J_red_I in component mitochondrial_NADH
 * delta_J_red_II in component mitochondrial_NADH
 * delta_J_gly_total in component mitochondrial_NADH
 * f_glu in component mitochondrial_NADH
 * f_PDHa in component mitochondrial_NADH
 * ATP_m in component ATP_ADP_exchange
 * ATP4_m in component ATP_ADP_exchange
 * ADP3_m in component ATP_ADP_exchange
 * Jp_TCA in component mitochondrial_ADP
 * d/dt V in component plasma_membrane
 * d/dt n in component delayed_rectifier_K_channel_current_n_gate
 * d/dt I in component delayed_rectifier_K_channel_current_I_gate
 * d/dt C in component fast_Ca_channel_current_C_gate
 * d/dt B in component fast_Ca_channel_current_B_gate
 * d/dt J in component slow_Ca_channel_current_J_gate
 * d/dt ADP_i in component cytosolic_ADP
 * d/dt delta_J_hyd in component cytosolic_ADP
 * d/dt Ca_i in component cytosolic_Ca
 * d/dt delta_psi in component mitochondrial_membrane
 * d/dt NADH_m in component mitochondrial_NADH
 * d/dt ADP_m in component mitochondrial_ADP
 * d/dt Ca_m in component mitochondrial_Ca