Process finished with exit code 138 (interrupted by signal 10: SIGBUS)

[Konstantinos Nasiotis]

Hi,

i am trying to use CPsolver (ortools 9.3.10497, python 3.9.13, M1 processor) for my project, and I am getting this BUS error:
Process finished with exit code 138 (interrupted by signal 10: SIGBUS)

when my script calls this line:
status = solver.SolveWithSolutionCallback(model, solution_printer)

I tried to recreate the issue with the self-sustained minimal script below, but this example script runs properly.

from ortools.sat.python import cp_model
solver = cp_model.CpSolver()
solver.parameters.max_time_in_seconds = 600
solution_printer = cp_model.ObjectiveSolutionPrinter()
model = cp_model.CpModel()
status = solver.SolveWithSolutionCallback(model, solution_printer)
solution_status = solver.StatusName(status)


After searching online, there are suggestions that the error might be related to multiple tests running simultaneously, but I'm not sure.

Anybody encountered this issue before?

Thanks

[Laurent Perron]

Can you try without the callback ?

Laurent Perron | Operations Research | lpe...@google.com | (33) 1 42 68 53 00

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[Konstantinos Nasiotis]

You mean like this?
self.solver.Solve(self.model, solution_printer)

Same error.

[Laurent Perron]

no, Solve(model)

Laurent Perron | Operations Research | lpe...@google.com | (33) 1 42 68 53 00

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[Konstantinos Nasiotis]

self.solver.Solve(self.model)

same error.

[Laurent Perron]

can you send me the model ?

Laurent Perron | Operations Research | lpe...@google.com | (33) 1 42 68 53 00

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[CV_OR]

Hi, 

I have the same error with ortools 9.3.10497, python 3.9.2, M1 processor. 

I basically get the error even if I try to run the examples in the Guide without any modification (e.g. just copy/past the TSP complete program in the guide https://developers.google.com/optimization/routing/tsp). 

Specifically, the error message in the terminal is "Bus error: 10" and seems to arise in this line:

search_parameters = pywrapcp.DefaultRoutingSearchParameters()

Any clue on what is happening?

[Laurent Perron]

This is a different solver. 

To view this discussion on the web visit https://groups.google.com/d/msgid/or-tools-discuss/3593f91f-2a52-4783-9a22-fa449dd42510n%40googlegroups.com.

[Mizux Seiha]

how did you get your python 3.9.2 on M1 ? using homebrew, native or downloaded from python.org ?

Otherwise:
`from ortools.sat.python import cp_model` this is need to use the CP-SAT Solver
samples here: https://github.com/google/or-tools/tree/main/ortools/sat/samples

and `from ortools.constraint_solver import pywrapcp` to use the Legacy/Deprecated CP Solver
sampels here: https://github.com/google/or-tools/tree/main/ortools/constraint_solver/samples

[CV_OR]

I have followed the Installation Guide, so I did it using brew:

brew install python 

python3 -m pip install -U --user wheel six