Current group: sci.op-research
ampl, solvers and external functions
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 | | From: | Sascha Herpers | | Subject: | ampl, solvers and external functions | | Date: | Fri, 14 Jan 2005 17:49:57 +0100 |
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 | Hi,
I have problems using external/imported functions with certain solvers
in conjunction with ampl.
I know how to import functions to be used in ampl. Unfortunatly not all
solvers seem to accept those imported functions.
I added a simple function to a very basic lp and solved it with minos.
Unfortunatly I need integers for some of the variables, but minos (of
course) uses floats instead.
I could use cplex, but cplex tells me, it doesn't know my functions.
As I understand it, adding imported functions to lp's makes them non-lp.
Could that be true?
If so, is there a nlp solver, that accepts imported function but still
let's me use integer variables?
Thanks,
Sascha
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