# Error code (-11)

**URL:** <https://discuss.ampl.com/t/error-code-11/1008>\
**Category:** Support\
**Tags:** errors-and-messages\
**Created:** [March 21, 2024, 1:23am UTC](https://discuss.ampl.com/t/error-code-11/1008 "2024-03-21T01:23:24Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![4er](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/4er/32/530_2.png) [@4er](https://discuss.ampl.com/u/4er)\
**Post date:** [March 22, 2024, 3:27am UTC](https://discuss.ampl.com/t/error-code-11/1008/2 "2024-03-22T03:27:56Z")

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We have seen this form of error message only when modeling is being done with Pyomo rather than AMPL. Specifically, the message beginning `ERROR:` `Solver` `(asl)` `returned` `...` occurs when Pyomo calls a solver that has an asl (AMPL-solver library) interface.

This particular return code (`-11`) is seen with various solvers. According to a comment at [https://stackoverflow.com/questions/44229593/what-does-status-code-11-from-the-pyomo-couenne-solver-mean](https://stackoverflow.com/questions/44229593/what-does-status-code-11-from-the-pyomo-couenne-solver-mean), it indicates a crash — specifically, a segmentation fault. But it does not give any indication of the reason for the crash.

Can you provide the following information, which may be useful in providing some help with the asl cplex solver?

- Execute the command “`cplex` `-v`” from an operating-system prompt, and show all of the output that results.

- Given any details you have about where you where/how you downloaded the `cplex` executable that you are using.

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