[ADMB Users] Error message

[John Sibert]

Dave is correct and Mollie's suggestion to put bounds on x is a good one.
http://www.derivative-calculator.net/#expr=sqrt%28x%29

However the troublesome question is why you did not get a divide by zero 
error.

John

John Sibert
Emeritus Researcher, SOEST
University of Hawaii at Manoa
Honolulu HI (GMT-10)
808-294-3842

Visit the ADMB project http://admb-project.org/

On 01/29/2013 07:49 PM, Hai Che wrote:
> Dear all,
>
> I kept getting the error message:
>
> Attempting to take the derivative of sqrt(prevariable x) at x=0
>
> after 30-40 iterations using ADMB. I tried different starting values 
> and etc. Nothing helped. Could you help providing some suggestions on 
> this problem?
>
> Hai
>
>
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