Concavity and Convexity

I am working in a DNLP model ,which involves interpolation functions,
I was wondering if there are any solver in GAMS that can deal with non-
convex functions. Currently I am using CONOPT , I got feasible
solution but not the answers that I expect. I tried also with BARON
but I got the follow error:
" Cannot handle function ‘bool_and’
Cannot handle function ‘rel_ge’
Cannot handle function ‘rel_lt’"

Any help would be greatly appreciated

Omar

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Hi I am also a new user of GAMS .
But found a link on non convex… May be its of use to u…


http://www.gams.com/solvers/solvers.htm

regards

deepti


On Sat, Sep 3, 2011 at 2:43 AM, Omar wrote:

I am working in a DNLP model ,which involves interpolation functions,
I was wondering if there are any solver in GAMS that can deal with non-
convex functions. Currently I am using CONOPT , I got feasible
solution but not the answers that I expect. I tried also with BARON
but I got the follow error:
" Cannot handle function ‘bool_and’
Cannot handle function ‘rel_ge’
Cannot handle function ‘rel_lt’"

Any help would be greatly appreciated

Omar


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Deepti Chadha (Singhal)


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