Need help for a problem with impulse response function (IRF) of an ARIMA model!!!

[Dung Nguyen]

I read the manual about IRF after ARIMA in tsarimapostestimation.pdf, page 6-8. And I try to do exactly the example 2 but my Stata doesn't work like the example 2 (as can see in the photo I upload). Because I need to run my dynamic model and create IRF which is quite similiar process with this example.
Please help me with this problem.

[Roberto Ferrer]

From -help irf-:

irf can be used only after var, svar, and vec

[Rafal Raciborski (StataCorp)]

irf after arima and arfima was introduced in Stata 13.1. Dung should ask the lab personnel to update Stata.

[Dung Nguyen]

irf after arima and arfima was introduced in Stata 13.1. Dung should ask the lab personnel to update Stata.

Thank you, I updated Stata 13.0 to Stata 13.1 (for Windows) and that problem was solved. But I got another problem. Here it is: First, I run the model:

And after the regression, I need to create IRF or cumulative IRF.
I tried in Linear regression but IRF does not work with "regress".
I also tried in VAR model but cannot exclude lags of dependent variable (R) on the right side (3 independent variables in this equation is exogenous).
And I figure out ARIMA model so it lights some hope when I test the above example 2 after update Stata. But once again, IRF can only be created when the ARIMA model contain AR and/or MA term(s):

And I really stuck in this problem. For now, I have not found any solution yet. Please help me with this problem.

[Dung Nguyen]

From -help irf-:

Sorry Roberto, I'm trying to do with your advice, but I still not know how to use command "input" to describe my dataset, I will fix it as soon as possible. Thank you for your advice.