hi
I have an empty branch callback and trying to solve seymour-disj_10 presolved version.
https://miplib2010.zib.de/miplib2010/seymour-disj-10.phpError log is attached.
Works ok with mip empahsis changed to 3.
Version identifier: 12.10.0.0 | 2019-11-26 | 843d4de
CPXPARAM_Preprocessing_Reduce 1
CPXPARAM_Preprocessing_Linear 0
CPXPARAM_Threads 32
CPXPARAM_MIP_Strategy_File 3
CPXPARAM_Emphasis_MIP 2
CPXPARAM_MIP_Strategy_HeuristicFreq -1
CPXPARAM_TimeLimit 3600
Warning: Control callbacks may disable some MIP features.
Tried aggregator 1 time.
MIP Presolve eliminated 1 rows and 0 columns.
MIP Presolve modified 2 coefficients.
Reduced MIP has 4788 rows, 1030 columns, and 62118 nonzeros.
Reduced MIP has 995 binaries, 35 generals, 0 SOSs, and 0 indicators.
Presolve time = 0.03 sec. (19.05 ticks)
Probing time = 0.01 sec. (1.24 ticks)
Tried aggregator 1 time.
Reduced MIP has 4788 rows, 1030 columns, and 62118 nonzeros.
Reduced MIP has 995 binaries, 35 generals, 0 SOSs, and 0 indicators.
Presolve time = 0.02 sec. (16.13 ticks)
Probing time = 0.00 sec. (1.24 ticks)
Clique table members: 216.
MIP emphasis: optimality.
MIP search method: traditional branch-and-cut.
Parallel mode: deterministic, using up to 32 threads.
Root relaxation solution time = 1.60 sec. (1178.27 ticks)
Root node processing (before b&c):
Real time = 1.69 sec. (1241.92 ticks)
Parallel b&c, 32 threads:
Real time = 0.00 sec. (0.00 ticks)
Sync time (average) = 0.00 sec.
Wait time (average) = 0.00 sec.
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Total (root+branch&cut) = 1.69 sec. (1241.92 ticks)
Exception in thread "main" ilog.cplex.CpxException: CPLEX Error 3019: Failure to solve MIP subproblem.
at ilog.cplex.CplexI.CALL(CplexI.java:5204)
at ilog.cplex.CplexI.setStatus(CplexI.java:6708)
at ilog.cplex.CplexI.access$600(CplexI.java:190)
at ilog.cplex.CplexI$SolveHandle.stop(CplexI.java:3162)
at ilog.cplex.CplexI.solve(CplexI.java:3212)
at ilog.cplex.CplexI.solve(CplexI.java:3204)
at ilog.cplex.IloCplex.solve(IloCplex.java:13062)
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srinivas tamvada
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#DecisionOptimization