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I want to import a model containing hundreds of eqonometric equations and thousands of identities. A program that reads the identities from a text file and performs the necessary substitutions work ok. But how can I import equations from a text file where each line looks something like

DEL(1:LOG(BH10)) = bhr11+bhr.11+bh.11[1]+bh.11[2]*DEL(1:LOG(BH10(-1)))+...

into an equation object? (Don't mind the different syntax, that can be changed by substitution)

Thanks, but it does not work declareing an econometric Equation object and then append the equation formulation read from a text file and edited into EViews syntax. Even this does not work:

equation eq1
eq1.append h10 c dum904 jk72

But this does:

%eq_bh10 = "h10 c dum904 jk72"
equation eq_bh10.ls {%eq}

It seems like the estimation method has to be predetermined to be a property of the equation object and the equation formulation read from file has to be transformed to EViews syntax by string manipulation. Is that that true?

Yes.