[R] optim: abnormal termination in lnsrch (resend)

[Berend Hasselman]

Mario Valle wrote:
> 
> [sorry, forgot some details...]
> 
> I'm using optim(param, fun, method='L-BFGS-B', lower=lo, upper=up) to 
> minimize a certain function.
> Often the minimization ends with the message:
> ERROR: ABNORMAL_TERMINATION_IN_LNSRCH
> 
> What is optim() trying to say?
> What have I to change in my function to make the minimization succeed?
> Do you think using BBoptim() instead of optim() changes anything?
> 

We need more information.
You can also try the additional argument to optim for tracing  the
optimization.
Use optim(param, fun, method='L-BFGS-B', lower=lo, upper=up
,control=list(trace=6))
to get more information.

Berend
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