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Varmax dummy variables

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Varmax dummy variables

Hi,

I'm running a VAR on monthly data, and I have two dummy variables I've included to eliminate outliars on 01may2010 and 01jun2010,   (i.e. they are one on those dates and zero otherwise)

When I run a VARX model with two autoregresive lags and both dummy variables included I get the error message

"The model is not full rank when the forecasts of regressors are computed. The VARMAX

procedure stopped processing further steps."

Which is also a problem I had previously when I tried to include a trend term manually instead of through the "trend=linear".

My question is: is there any option for eliminating these outliers besides dummy variables, or is there a way to stop Varmax from computing the forecasts of regressors?

Thanks,

Alex

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