DSGE建模中出现了这个问题，是我的模型方程出了问题，还是整体方程有问题？

%(16)
exp((1-epsilon_p)*pi) = (1-xi)*exp((1-epsilon_p)*pistar) +xi;

关于通胀的一个方程，xi为不改变价格企业的比率

STEADY:  The Jacobian contains Inf or NaN. The problem arises from:

STEADY:  Derivative of Equation 16 with respect to Variable pi  (initial value of pi: -Inf)

STEADY:  The problem most often occurs, because a variable with
STEADY:  exponent smaller than 1 has been initialized to 0. Taking the derivative
STEADY:  and evaluating it at the steady state then results in a division by 0.
错误使用 dynare_solve (line 60)