[SCIP] GCG errors while running detect

Thu Jul 5 17:14:20 CEST 2018

Hi Michael,

did you install hmetis? In any case, I recommend to upgrade your
SCIPOptSuite to 6.0 which includes GCG 3.0. If hmetis is not installed
problems may persist but it will be easier to help you out from that fresh
starting point. BTW, there is a release report coming with the new release,
check the section on GCG to have an impression of what you can do with the
"explore" menu after detection.

http://www.optimization-online.org/DB_HTML/2018/07/6692.html

You wrote "If I can get it working, it will solve many problems." --> we
would be very happy to hear about successes and failures, application cases
or whatever you do with GCG. Please consider writing us about this.

All the best,
Marco

> ---------- Forwarded message ----------
> From: Michael Gough <innovative.engineer at gmail.com>
> Date: 2018-06-28 21:56 GMT+02:00
> Subject: [SCIP] GCG errors while running detect
> To: scip at zib.de
>
>
> Hi all,
>
> I am running GCG and I did the following which is part of the getting
> started documentation for GCG. The instance loads but detect gives errors.
> Any insights would be appreciated.
>
> Michael Gough
>
>
> [nix-shell:~/scipoptsuite-5.0.1/gcg]$ bin/gcg
> GCG version 2.1.4 [GitHash: 58a7828]
> Copyright (c) 2010-2018 Operations Research, RWTH Aachen University
>                         Konrad-Zuse-Zentrum fuer Informationstechnik
> Berlin (ZIB)
>
> SCIP version 5.0.1 [precision: 8 byte] [memory: block] [mode: optimized]
> [LP solver: SoPlex 3.1.1] [GitHash: b1c222a]
> Copyright (C) 2002-2018 Konrad-Zuse-Zentrum fuer Informationstechnik
> Berlin (ZIB)
>
> External codes:
>   Readline 6.3         GNU library for command line editing (
> gnu.org/s/readline)
>   SoPlex 3.1.1         Linear Programming Solver developed at Zuse
> Institute Berlin (soplex.zib.de) [GitHash: ab921a5]
>   CppAD 20160000.1     Algorithmic Differentiation of C++ algorithms
> developed by B. Bell (www.coin-or.org/CppAD)
>   ZLIB 1.2.11          General purpose compression library by J. Gailly
> and M. Adler (zlib.net)
>   bliss 0.73           A Tool for Computing Automorphism Groups of Graphs
> by T. Junttila and P. Kaski (http://www.tcs.hut.fi/Software/bliss/)
>
> user parameter file <gcg.set> not found - using default parameters
>
> GCG> read check/instances/cs/TEST0055.lp
>
> read problem <check/instances/cs/TEST0055.lp>
> ============
>
> original problem has 220 variables (0 bin, 220 int, 0 impl, 0 cont) and 30
> constraints
> GCG> detect
> Starting detection
> Detecting purely block diagonal structure: not found.
> Detecting set partitioning master structure: found with 20 blocks.
> Detecting aggregatable structure: found 1 decompositions.
> Detecting staircase structure: found 3 blocks.
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.2> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.3> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.4> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.5> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.6> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.7> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.8> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.9> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.10> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.11> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.12> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.13> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.14> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.15> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.16> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.17> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.18> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.19> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> [src/graph/hypergraph_def.h:225] ERROR: Could not open file
> <gcg-metis-wUEDOC.part.20> for reading
> [src/graph/hyperrowgraph.h:96] ERROR: Error <-2> in function call
> [src/dec_arrowheur.cpp:288] ERROR: Error <-2> in function call
> Detecting Arrowhead structure: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
> 19 20 done, 0 decompositions found.
> WARNING: Decomposition type is staircase, cannot compute score
> Chosen decomposition with 20 blocks of type bordered.
> Detection was successful.
> GCG>
>
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>
>
>
> --
> Prof. Dr. Marco Lübbecke
> RWTH Aachen University
> Chair of Operations Research
> Kackertstrasse 7
> D-52072 Aachen
> Germany
>
> fon / fax: +49 241 80-93362 / 92369
> marco.luebbecke at rwth-aachen.de
> www.or.rwth-aachen.de/luebbecke
>
>
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