Hi!

I want to convert S-Plus 6.2 code to R 2.1.0. Instead of the function nlminb I use the function optmin

optmin(start,fn,gr,method="L-BFGS-B", lower, upper, hess,...)

But then I get the Error in optmin ...: L-BFGS-B needs finite values of fn

Then I used optmin(start,fn,gr,method="BFGS", hess, ...)

But then I get the Error in optmin ...: initial value in vmmin is not finite

I know the final parameter estimates from S-Plus which I use as starting values in R.
The upper and lower bounds are close around the final estimates.
So there is not much to maximize.

What can I do?

Thank you for help,

Peter

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