Model is underconstrained.
The following variables couldn't be defined:
 * V in component membrane
 * proton_motive_force in component membrane
 * pH_i in component membrane
 * pH_m in component membrane
 * JH_res in component proton_pump
 * JH_leak in component proton_leak
 * JH_F1 in component F0_F1_ATPase
 * J_ant in component ATP_ADP_exchange
 * J_uni in component Ca_uniporter
 * J_Na_Ca in component Na_Ca_exchanger
 * Jo in component proton_pump
 * A_res in component proton_pump
 * NAD_m in component differential_equations
 * Jp_F1 in component F0_F1_ATPase
 * A_F1 in component F0_F1_ATPase
 * ADP_m_free in component F0_F1_ATPase
 * ATP_m in component differential_equations
 * ATP_i in component differential_equations
 * J_red in component NAD_reduction
 * f_PDHa in component NAD_reduction
 * J_gly_tot in component glycolytic_phosphorylation_of_ADP
 * J_ptca in component TCA_cycle_ADP_phosphorylation
 * J_hyd in component hydrolysis_of_ATP
 * k_hyd in component hydrolysis_of_ATP
 * J_erout in component Ca_release_from_the_ER
 * IP3 in component Ca_release_from_the_ER
 * J_serca in component pumping_Ca_into_the_ER
 * d/dt V in component membrane
 * d/dt NADH_m in component differential_equations
 * d/dt ADP_m in component differential_equations
 * d/dt ADP_i in component differential_equations
 * d/dt Ca_m in component differential_equations
 * d/dt Ca_ER in component differential_equations
 * d/dt Ca_i in component differential_equations
 * d/dt h in component differential_equations