# \#mip

**URL:** https://discourse.julialang.org/tag/mip/1812.md

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## [A Primal-Dual Global Optimization approach on the Cutting Stock Problem](https://discourse.julialang.org/t/a-primal-dual-global-optimization-approach-on-the-cutting-stock-problem/129686)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 18\
**Last updated:** [July 7, 2025, 10:38pm UTC](https://discourse.julialang.org/t/a-primal-dual-global-optimization-approach-on-the-cutting-stock-problem/129686 "2025-07-07T22:38:49Z")

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This doc reads a bit lengthy, because it uses complex data structures (maybe for visualization purposes). Therein it uses economic interpretation, which is hard to understand for me. Therefore, I explicitly wrote the…

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## [Solving a large scale MILP problem with cplex takes long time](https://discourse.julialang.org/t/solving-a-large-scale-milp-problem-with-cplex-takes-long-time/130491)

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**Author:** [@JOHN1](https://discourse.julialang.org/u/JOHN1)\
**Replies:** 3\
**Last updated:** [July 6, 2025, 9:24pm UTC](https://discourse.julialang.org/t/solving-a-large-scale-milp-problem-with-cplex-takes-long-time/130491 "2025-07-06T21:24:44Z")

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i am solving a large scale MILP problem with cplex, it takes too much time and cannot obtain the sollution, does it means that cplex is not suitable for this large scale MILP problem? what can i do to acceralate the solv…

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## [Gurobi gets stuck after "Loaded MIP start from previous solve"](https://discourse.julialang.org/t/gurobi-gets-stuck-after-loaded-mip-start-from-previous-solve/130406)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 13\
**Last updated:** [July 6, 2025, 5:34am UTC](https://discourse.julialang.org/t/gurobi-gets-stuck-after-loaded-mip-start-from-previous-solve/130406 "2025-07-06T05:34:33Z")

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I’m writing the Benders’ decomposition for an MIP and encountering a very weird behavior of Gurobi. There is an MIP that I need to modify its obj and repeatedly re-solve (Gurobi can (according to its Logging) Loaded MIP…