Automatic (Time Rolling) forecasting in a program

[rachanon.c]

I'm ฺamateur for this Programming
I want to forecast data with Arima model by time rolling (Forecast every 4 Quarter forward). I try programming and it's show "No coefficients specified in........". I must have done something wrong for programming. Could you help me?

Many thanks!

[EViews Gareth]

What are the first 7 lines of the program for - what are they meant to do?

[rachanon.c]

It just name and series data for equation.

[EViews Gareth]

I'm not really sure what your program is doing, so hard to pin point any issues. The first 7 lines don't make sense (or, aren't needed). The forecast lines outside of the loop doesn't make sense to me either.

[rachanon.c]

Okay from your help, I think my first 7 lines aren't needed. I want to make equation that loop forecast step by step ahead 4 Quarter and keep series in forecast series to compare. Maybe I am programming wrong from begin.