Lukas Weimann

Gurobi-versary
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Activity overview

Latest activity by Lukas Weimann

  • Lukas Weimann created a post,

    Confusion about MILP log: "best objective" not part of solutions, gap doesn't match

    Ongoing
    1. Community
    2. Other

    Hello, I try to minimze an MILP problem of which I know that the optimal solution is 0. I formulated the problem in Matlab 2020b using the latest version of YALMIP as interface and Gurobi v9.1.1. H...

    • Lukas Weimann
    • 2 followers
    • 1 comment
    • 0 votes

  • Lukas Weimann commented,

    1. Community
    2. Other
    3. GRBaddnodefile failed

    Hello Jaromił, thanks for your fast response! Running out of space on the disc was also my first guess, but I discarded this thought because there should be 100+GB available. However, I did not thi...

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    • Lukas Weimann
    • 0 votes

  • Lukas Weimann created a post,

    GRBaddnodefile failed

    Answered
    1. Community
    2. Other

    Hello, I'm currently trying to solve a rather large MILP (~4.3 million nonzeros after presolve) with Gurobi 9.0.0 on 8 threads with 16 GB RAM. I formulated the problem in MATLAB. As the solution is...

    • Lukas Weimann
    • 2 followers
    • 3 comments
    • 0 votes

  • Lukas Weimann created a post,

    Question about MILP parallelization

    1. Community
    2. Algorithms

    Hello community, I have a general question about the branch and bound performance when operated on >1 cores.I recently ran a rather large optimization problem (100000+ decision variables, 1000+ int...

    • Lukas Weimann
    • 2 followers
    • 1 comment
    • 0 votes