Model is underconstrained.
The following variables couldn't be defined:
 * ERG in component ERG
 * V_6 in component V_6
 * V_8 in component V_8
 * E2FA in component E2FA
 * V_2 in component V_2
 * CycE_T in component CycE
 * CycD_T in component CycD
 * V_4 in component V_4
 * Rb_hypo in component Rb_hypo
 * H in component GM
 * PP1_A in component PP1_A
 * E2F_Rb in component E2F_Rb
 * L in component L
 * d/dt ERG in component ERG
 * d/dt DRG in component DRG
 * d/dt Kip1 in component Kip1
 * d/dt CycA_Kip1 in component CycA_Kip1
 * d/dt CycD_Kip1 in component CycD_Kip1
 * d/dt CycE_Kip1 in component CycE_Kip1
 * d/dt CycA in component CycA
 * d/dt CycB in component CycB
 * d/dt CycE in component CycE
 * d/dt CycD in component CycD
 * d/dt Cdc20 in component Cdc20
 * d/dt Cdc20_T in component Cdc20_T
 * d/dt IEP in component IEP
 * d/dt PPX in component PPX
 * d/dt E2F in component E2F
 * d/dt Cdh1 in component Cdh1
 * d/dt GM in component GM
 * d/dt mass in component mass