Description
Hi,
When I used JuMP + Gurobi.jl (Gurobi 12.0.1) for this MIQCQP case: https://qplib.zib.de/QPLIB_3855.html
The instance is in .mps file (https://www.mixedinteger.org/2025/competition/Initial_problem_set.zip) with name "Test_prob_20.mps".
Gurobi.jl solved this instance and reported that it was infeasible.
However, this case should be feasible. And I tried to use gurobipy and can solve this case correctly.
I guess there is some issue in gurobi.jl interface, or JuMP function read_from_file() for .mps file.
Update1 : I found JuMP + Gurobi.jl solved the .lp file correctly, just wrong with the .mps file.
Update2: I found a way to reproduce the bug:
1, use gurobipy to read the .lp file from https://qplib.zib.de/QPLIB_3855.html, and write it as .mps file with GRB.
2, then JuMP + Gurobi.jl can solve the original .lp instance correctly but wrong with the new generated .mps file.