forecasting ARMA diff vairable

[msimoes]

Dear all,
when I try to forecast a variable with an equation that has that variable in differentiated form say, d(mwh) ar(1) sar(12) ma(12), the graphical interface offers two alternatives for the forecasted series: d(mwh) or mwh.
How can I program that option in script form?
Thanks,
Mario

[EViews Gareth]

From the object reference:

Code: Select all

equation.forecast(d) yf - In models with implicit dependent variables, forecast the entire expression rather than the normalized variable.

[msimoes]

Thank you for your prompt answer.
However, I will have to double check wheteher the error (rmse, mape, mae, etc...) results are correctly calculated; initially it appears something is amiss.
Yours,
Mario