equation does not have estimates

[geyer]

Hi!

in case an equation does not have estimates (e.g. because a nonlinear model failed to converge), what are the "values" in eqn.@coef() ? a blank string or zero or na?
I'm not interested in ways to overcome the non-convergence which lead to the non-existing estimates. I would just like to include an IF statement in my program to find out what the "nature" of the estimates is (i.e. numbers, as expected, or something else, like a blank string etc.).

Thanks!

~~Alois

[EViews Gareth]

If the equation doesn't have estimates, accessing any of the data members will result in an error (which you could trap to check whether it does have estimates or not).

[EViews Glenn]

Note that nonconvergence of a nonlinear estimation procedure will still produce estimates.