[ADMB Users] No gradient ?

[Campbell, Alex]

Thanks Dave! Not because you were on the money but because you inspired
me to re-examine my PRELIMINARY_CALCS_SECTION. I shouldn't have had an
operation in there that needed to be visible to the autodif machinery (p
= mfexp(-nlogp);). At least that is my inference. This was so hard to
debug because the values of all my variables were 100% correct.

-alex

-----Original Message-----
From: users-bounces at admb-project.org
[mailto:users-bounces at admb-project.org] On Behalf Of dave fournier
Sent: Friday, 18 February 2011 4:51 AM
To: users at admb-project.org
Subject: Re: [ADMB Users] No gradient ?

Maybe you are accumulating into an uninitialized variable.

as in

     dvariable x;   // x is uninitialized

       x+=u;    // trouble
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