EViews.com

Hi, I am using Version 8. My question has to do with the fact I got the following statement from EViews work file, as shown below. Any tips to fix the problem? Please adise.
Kind regards,
Jason
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Equation does not have estimates

Estimation Command:
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LS LOG(RATEOPPRV_AUT) C LOG(RPCETOTTO_AUT) LOG(YPCOM_AUT) @TREND

Estimation Equation:
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LOG(RATEOPPRV_AUT) = C(1) + C(2)*LOG(RPCETOTTO_AUT) + C(3)*LOG(YPCOM_AUT) + C(4)*@TREND

What happens if you hit the estimate button?

I would get "insufficient number of observations" error message. When I check the history data file, (this indicator being a ratio of two indicators) there are no missing values. However, in the work file, the derived ratio only contains one observation.

With only one observation, the equation cannot estimate (hence the error message).