Model is underconstrained.
The following variables couldn't be defined:
 * V in component membrane
 * i_NaP in component persistent_sodium_current
 * i_Na in component fast_sodium_current
 * i_K in component potassium_current
 * i_L in component leakage_current
 * i_tonic_e in component tonic_current
 * m_infinity in component fast_sodium_current_m_gate
 * n_infinity in component fast_sodium_current_n_gate
 * tau_n in component fast_sodium_current_n_gate
 * n_infinity in component potassium_current_n_gate
 * tau_n in component potassium_current_n_gate
 * m_infinity in component persistent_sodium_current_m_gate
 * h_infinity in component persistent_sodium_current_h_gate
 * tau_h in component persistent_sodium_current_h_gate
 * d/dt V in component membrane
 * d/dt n in component fast_sodium_current_n_gate
 * d/dt n in component potassium_current_n_gate
 * d/dt h in component persistent_sodium_current_h_gate