# Warning displayed after running

**URL:** <https://discourse.julialang.org/t/warning-displayed-after-running/120947>\
**Category:** Optimization (Mathematical)\
**Tags:** gurobi\
**Created:** [October 5, 2024, 2:49am UTC](https://discourse.julialang.org/t/warning-displayed-after-running/120947 "2024-10-05T02:49:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jimery](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jimery/32/212423_2.png) [@Jimery](https://discourse.julialang.org/u/Jimery)\
**Post date:** [October 5, 2024, 2:49am UTC](https://discourse.julialang.org/t/warning-displayed-after-running/120947/1 "2024-10-05T02:49:32Z")

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┌ Warning: The model has been modified since the last call to `optimize!` (or `optimize!` has not been called yet). If you are iteratively querying solution information and modifying a model, query all the results first, then modify the model.

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**Author:** ![baggepinnen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/baggepinnen/32/693_2.png) [@baggepinnen](https://discourse.julialang.org/u/baggepinnen)\
**Post date:** [October 5, 2024, 4:27am UTC](https://discourse.julialang.org/t/warning-displayed-after-running/120947/2 "2024-10-05T04:27:12Z")

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Is this a question?

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<div class="post-metadata">

**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [October 7, 2024, 2:00am UTC](https://discourse.julialang.org/t/warning-displayed-after-running/120947/3 "2024-10-07T02:00:25Z")

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Hi @Jimery, welcome to the forum 😄

I hope this warning is somewhat self explanatory. See this part of the documentation for a deeper explanation: [Solutions · JuMP](https://jump.dev/JuMP.jl/dev/manual/solutions/#OptimizeNotCalled-errors)

Let me know if you have follow-up questions.