Model is underconstrained.
The following variables couldn't be defined:
 * E in component E
 * d/dt E in component E
 * d/dt ENa in component ENa
 * d/dt EH in component EH
 * d/dt ENH4 in component ENH4
 * d/dt E_ in component E_
 * d/dt ENa_ in component ENa_
 * d/dt EH_ in component EH_
 * d/dt ENH4_ in component ENH4_