How to control the number of iterations

Hi

I'm a newbie with Python and I try to follow this MOOC : https://www.coursera.org/learn/operations-research-algorithms/home/welcome

After, installing python and Gurobi on my computer (an old computer with Windows 10), I tried to launch these lines.

This is the result (with Jupyter Lab and with VSCode :

Gurobi Optimizer version 11.0.3 build v11.0.3rc0 (win64 - Windows 10.0 (19045.2))

CPU model: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz, instruction set [SSE2|AVX|AVX2]
Thread count: 4 physical cores, 4 logical processors, using up to 4 threads

Optimize a model with 3 rows, 2 columns and 6 nonzeros
Model fingerprint: 0xeaf3d20c
Coefficient statistics:
  Matrix range     [1e+00, 5e+01]
  Objective range  [7e+02, 9e+02]
  Bounds range     [0e+00, 0e+00]
  RHS range        [2e+03, 5e+03]
Presolve removed 3 rows and 2 columns
Presolve time: 0.01s
Presolve: All rows and columns removed
Iteration    Objective       Primal Inf.    Dual Inf.      Time
       0    2.1600000e+05   0.000000e+00   0.000000e+00      0s

Solved in 0 iterations and 0.01 seconds (0.00 work units)
Optimal objective  2.160000000e+05

The optimal objective should be 789473.68.

What is the problem ? From my computer ? From the code (because it's a old MOOC and something change with the new versions of Gurobi ?) ?

For your information, I launched the code from https://www.gurobi.com/documentation/current/examples/diet_py.html and the result is :

Set parameter Username
Gurobi Optimizer version 11.0.3 build v11.0.3rc0 (win64 - Windows 10.0 (19045.2))

CPU model: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz, instruction set [SSE2|AVX|AVX2]
Thread count: 4 physical cores, 4 logical processors, using up to 4 threads

Optimize a model with 4 rows, 12 columns and 39 nonzeros
Model fingerprint: 0x33ddb849
Coefficient statistics:
  Matrix range     [1e+00, 2e+03]
  Objective range  [9e-01, 3e+00]
  Bounds range     [7e+01, 2e+03]
  RHS range        [7e+01, 2e+03]
Presolve removed 0 rows and 2 columns
Presolve time: 0.10s
Presolved: 4 rows, 10 columns, 37 nonzeros

Iteration    Objective       Primal Inf.    Dual Inf.      Time
       0    0.0000000e+00   1.472500e+02   0.000000e+00      0s
       4    1.1828861e+01   0.000000e+00   0.000000e+00      0s

Solved in 4 iterations and 0.18 seconds (0.00 work units)
Optimal objective  1.182886111e+01

Cost: 11.8289

Buy:
hamburger 0.604514
milk 6.97014
ice cream 2.59132

Adding constraint: at most 6 servings of dairy
Gurobi Optimizer version 11.0.3 build v11.0.3rc0 (win64 - Windows 10.0 (19045.2))

CPU model: Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz, instruction set [SSE2|AVX|AVX2]
Thread count: 4 physical cores, 4 logical processors, using up to 4 threads

Optimize a model with 5 rows, 12 columns and 41 nonzeros
Coefficient statistics:
  Matrix range     [1e+00, 2e+03]
  Objective range  [9e-01, 3e+00]
  Bounds range     [7e+01, 2e+03]
  RHS range        [6e+00, 2e+03]
LP warm-start: use basis

Iteration    Objective       Primal Inf.    Dual Inf.      Time
       0    1.1828861e+01   5.698333e+01   0.000000e+00      0s

Solved in 0 iterations and 0.02 seconds (0.00 work units)
Infeasible model
No solution

Regards