Model is underconstrained. The following variables couldn't be defined: * R in component R * V1 in component V1 * V4 in component V4 * V2 in component V2 * V5 in component V5 * V6 in component V6 * V7 in component V7 * V3 in component V3 * V8 in component V8 * V9 in component V9 * V10 in component V10 * d/dt R in component R * d/dt R__ in component R__ * d/dt I in component I * d/dt O1 in component O1 * d/dt O2 in component O2 * d/dt R_ in component R_ * d/dt C1 in component C1 * d/dt Ca_ER in component Ca_ER * d/dt Ca_cyt in component Ca_cyt * d/dt Ca_L in component Ca_L