Gurobi 10.0.1: Error: Objective Q not PSD (negative diagonal entry)

Support
1

Please help, when i use gurobi to solve the model appears: Gurobi 10.0.1: Error: Objective Q not PSD (negative diagonal entry), what does negative diagonal entry means? and how can i solve this problem? i tried setting nonconvex=2 but it doesn’t work.
Thank you in advance.
Model_S.dat (145.1 KB)
Model_S.mod (2.1 KB)
Model_S.run (137 Bytes)
here the files.

2

nonconvex=2 should be the value of gurobi_options:

ampl: option gurobi_options 'nonconvex=2';         
ampl: solve;                              
Gurobi 10.0.2:   qp:nonconvex = 2
Gurobi 10.0.2: infeasible or unbounded problem
942 simplex iterations
1 branching nodes

As you can see, the problem is reported infeasible or unbounded.

Set iisfind=1 to ask Gurobi for an IIS or use option feasrelax (if the problem is infeasible).