Function Estimate sometimes doesn't work

[jagutierrez]

Estimate doesn't work in the part "Parameters Information / $tmp$ / StDs" and it
also fails in "Parameters Information / $tmp$ / TStudent". In both cases it appears
a ? so it doesn´t calculate this real parameters.

Thanks.

[Víctor de Buen Remiro]

Dear Jorge Gutierrez

When parameter statistics are returning a ? char, the reason is that estimation
couldn't calculate it. This should be due to

1.- The environment variable Real DoStatistics was set to False. Then the
estimator doesn't make the calculations saving a valuable time in massive
estimations wich statistics nobody will to see. You can ensure it writing " Real
(DoStatistics:=True); " before the estimation calling.

2.- The estimation failed for numerical causes or an invalid model definition. Then
you must read the estimation messages to undesrtand the problem.

3.- The estimation works fine but the last jacobian matrix J calculation crashed for
numerical causes or couldn't be inverted. The parameters statistics are coming
from the (Sigma^2)*((J'J)-1) covarianze matrix that has some error.

4.- Another new no controlled problem that I don't know yet.

Please, ensure what is the problem and send me the isolated TOL code that
doesn't work. If you don't know how isolate the TOL code you can ask me another
time. If I can't reproduce the problem how I can resolve it?

Thanks for using this bug's reporting procedure.

Best regards

Victor de Buen

vdebuen
Phone : 976205729

[Víctor de Buen Remiro]

Dear Jorge Gutierrez

Since you hasn't answered anything about this bug I suposse you wasn't in case

4.-Another new no controlled problem that I don't know yet.

So I must set this bug to INVALID.

Anyway your problem will be taken into account to improve documentation and on-
line help in next versions to avoid future misunderstanding.