Model is underconstrained.
The following variables couldn't be defined:
 * C_m_Imp in component imported_variables
 * C_c_Imp in component imported_variables
 * psi_m in component imported_variables
 * psi_c in component imported_variables
 * C_m_Na in component solute_concentrations
 * J_mc_Na in component mc_sodium_flux
 * J_ms_Na in component ms_sodium_flux
 * J_sc_Na in component sc_sodium_flux
 * J_mc_K in component mc_potassium_flux
 * J_ms_K in component ms_potassium_flux
 * J_sc_K in component sc_potassium_flux
 * J_mc_Cl in component mc_chloride_flux
 * J_ms_Cl in component ms_chloride_flux
 * J_sc_Cl in component sc_chloride_flux
 * J_mc_NaCl in component mc_sodium_flux
 * G_mc_Na in component mc_sodium_flux
 * J_mc_KCl in component mc_potassium_flux
 * G_mc_K in component mc_potassium_flux
 * G_mc_Cl in component mc_chloride_flux
 * J_a in component sc_sodium_flux
 * G_sc_K in component sc_potassium_flux
 * G_sc_Cl in component sc_chloride_flux
 * G_ms_Na in component ms_sodium_flux
 * G_ms_K in component ms_potassium_flux
 * G_ms_Cl in component ms_chloride_flux
 * J_Na in component total_transepithelial_sodium_flux
 * J_K in component total_transepithelial_potassium_flux
 * J_Cl in component total_transepithelial_chloride_flux
 * Osm_m in component osmolarities
 * Osm_c in component osmolarities
 * Osm_s in component osmolarities
 * J_mc_v in component mc_transepithelial_volume_flux
 * J_ms_v in component ms_transepithelial_volume_flux
 * J_sc_v in component sc_transepithelial_volume_flux
 * J_v in component total_transepithelial_volume_flux
 * d/dt C_m_Na in component solute_concentrations
 * d/dt C_s_Na in component solute_concentrations
 * d/dt C_c_Na in component solute_concentrations
 * d/dt C_m_K in component solute_concentrations
 * d/dt C_s_K in component solute_concentrations
 * d/dt C_c_K in component solute_concentrations
 * d/dt C_m_Cl in component solute_concentrations
 * d/dt C_s_Cl in component solute_concentrations
 * d/dt C_c_Cl in component solute_concentrations