# Dummy variable change optimization result

**URL:** <https://discourse.julialang.org/t/dummy-variable-change-optimization-result/79646>\
**Category:** Optimization (Mathematical)\
**Tags:** jump, gurobi\
**Created:** [April 18, 2022, 7:05pm UTC](https://discourse.julialang.org/t/dummy-variable-change-optimization-result/79646 "2022-04-18T19:05:22Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**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:** [April 18, 2022, 10:10pm UTC](https://discourse.julialang.org/t/dummy-variable-change-optimization-result/79646/3 "2022-04-18T22:10:20Z")

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Hi there! Since this is your first post, you should take a read of [Please read: make it easier to help you](https://discourse.julialang.org/t/please-read-make-it-easier-to-help-you/14757). It’s easier to help if you can provide a reproducible example, instead of isolated lines.

> After optimization, OP\_t is 0 while all parameters and variables are non null and non negative.

Did you take a look at `termination_status(obj)` to see if Gurobi found a feasible solution? Apart from that, it’s hard to tell what’s going on without a reproducible example. Gurobi shouldn’t find a solution with the equality violated.

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_[View the full topic](https://discourse.julialang.org/t/dummy-variable-change-optimization-result/79646)._