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you can work around it by adding a constant to your specification.

Great, thanks, that works!

Thanks for your quick reply. Please find a schematic representation of the workfile attached. Running a forecast on eq01 produces the error.

Hi, I too get an "Internal Error 500 500" when forecasting in Eviews 9 (build 7 Jan 2016). I estimate a least squares panel with cross-section and period fixed effects. When trying to forecast, the "Internal Error 500 500" pops up, although the forecast is produced in the backgro...