overflow error

[essa]

Hi everyone, I am working over a SVAR model that includes a debt identity. The model is stated as under:

var var_p.ls 1 2 l_gg l_tt l_yy infl_q i @ c dy_i(-1 to -2)
model model_bt
model_bt.merge var_p
model_bt.append dy_i=dy_i(-1)*(1+0.25*i)/(1+l_yy-l_yy(-1)+infl_q) +(exp(l_gg)-exp(l_tt))/(exp(l_yy))

However, when run the program, I get the following error message:
Overflow in "DY_I=DY_I(-1)*(1+0.25*I)/(1+L_YY-L_YY(-1)+INFL_Q) +(EXP(L_GG)-EXP(L_TT))/(EXP(L_YY))" in "MODEL_BT.SOLVE"

I don't know if it's something wrong in my code or the simulated series is simply explosive. I would be so grateful if someone help me to solve the issue.

Thank you

[EViews Gareth]

Probably just explosive.