消灭零回复

这是回复的错误！我用的是月度数据，里面没有负数和零啊

WARNING: Forecast extension cannot be done for multiplicative or log-
additive seasonal adjustment due to negative or zero values
found in forecasts.
ERROR: Multiplicative or log additive seasonal adjustment cannot be
performed when preadjustment factors are derived from a regARIMA
model for data which have not been log transformed.
Check the values for the power or function arguments of the
transform spec and mode of the x11 spec.