Minzinc crash

[javierrodrigogomez]

Hi,

Running latest version v2.5.5 but as well with v2.5.4. I run a model and sometimes works and sometimes crashes with window message "unknown error while executing minizinc: crashed" and on the ouput "Process finished with non-zero exit code -1073741819".

I use CPLEX for the solver (v20.1 and v12.9) both with the same result.

If I run v2.5.3 I got the following error:
C:\Program Files\MiniZinc\share\minizinc/linear//fzn_lex_lesseq_int.mzn:14.8-20:
MiniZinc: type error: undefined identifier `MZN__Orbisack'
Process finished with non-zero exit code 1

I used to run same model with cplex 12.9 and Minizinc ide v2.3.2 and it worked perfectly. I tried to re-installed both previous versions of cplex and minizinc but I cannot get minizinc to load the cplex solver "MiniZinc: internal error: cannot load cplex dll `cplex12100.dll'. ¿Any idea how to update the configuration file for minizinc of cplex solver?

Any idea how to proceed?

[javierrodrigogomez]

Removing some of the constrains, the model runs without crashing. The problem is that with that message, it's impossible to debug it. Is there any log file to look at?

[alexeytref]

Same problem. Minizinc 2.5.5.
The problem does not depend on the solver, the error occurs at the compilation stage.
Strange thing: I have 2 mzn files, one includes the second one. If you combine them into one file, the error disappears.

[cyderize]

In general this error message indicates that MiniZinc has crashed. MiniZnc 2.6.0 features better error reporting for this, so it would be great if you could try out this version.

@alexeytref If your issue is still present in 2.6.0, could you open a new issue on the https://github.com/MiniZinc/libminizinc repository describing the problem (and if possible include a code example which demonstrates the issue)? It's likely not the same as the issue with CPLEX.

[alexeytref]

@cyderize
Sorry for delay. Installing minizinc 2.6.0 solved the problem.