CODEWITHSUNDEEP
amplscipipopt
Johannes
Johannes

Reputation: 21

SCIP with IpOpt and AMPL

I want to use SCIP with Ipopt and the AMPL interface to process .nl-files. The scip shell (without AMPL) includes Ipopt but is not able to read .nl-files. So I compiled the AMPL interface. But here, Ipopt does not seem to be included. The command "scip-3.2.0/interfaces/ampl/bin/scipampl -i" gives the following output.

SCIP version 3.2.0 [precision: 8 byte] [memory: block] [mode: optimized] [LP solver: SoPlex 2.2.0] [GitHash: fb0007a]

Copyright (c) 2002-2015 Konrad-Zuse-Zentrum fuer Informationstechnik Berlin (ZIB)

External codes:

Readline 6.2 GNU library for command line editing (gnu.org/s/readline)

SoPlex 2.2.0 Linear Programming Solver developed at Zuse Institute Berlin (soplex.zib.de) [GitHash: c9658ca]

cppad-20140000.3 Algorithmic Differentiation of C++ algorithms developed by B. Bell (www.coin-or.org/CppAD)

ZLIB 1.2.7 General purpose compression library by J. Gailly and M. Adler (zlib.net)

GMP 6.0.0 GNU Multiple Precision Arithmetic Library developed by T. Granlund (gmplib.org)

ZIMPL 3.3.3 Zuse Institute Mathematical Programming Language developed by T. Koch (zimpl.zib.de)

ASL AMPL Solver Library developed by D. Gay (www.netlib.com/ampl)

number of parameters = 1882 non-default parameter settings:

file <-i.nl> not found

no problem exists

[src/reader_nl.c:1694] ERROR: No AMPL problem read, cannot write AMPL solution then.*

Under external codes Ipopt is not listed. I tried several variants of reinstalling, but none worked. Would you know a work around? Note, that I was not able to copy scipampl to my path since I don't have to right to use sudo. The OS is CentOS.

Greetings from Frankfurt,

Johannes

Upvotes: 1

Views: 1075

Answers (1)

stefan
stefan

Reputation: 929

When you build the SCIP/AMPL executable, you need to specify IPOPT=true again.

Upvotes: 2

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