[SCIP] GCG errors while running detect

[Michael Gough]

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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