cbc solver doesn't dispatch the battery

[kbrunik]

Simulating` system with dispatch optimization...
         0 % complete
ERROR: Solver (cbc) returned non-zero return code (-6)
Traceback (most recent call last):
  File "baseline.py", line 862, in <module>
    testing()
  File "baseline.py", line 817, in testing
    run_simulations(location=location, output_level=0, verbose=True, show_plots=False, save_plots=False)
  File "baseline.py", line 691, in run_simulations
    hopp_results =          run_hopp(hopp_site,
  File "baseline.py", line 384, in run_hopp
    hybrid_plant.simulate(hopp_scenario["Useful Life"])
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/hybrid_simulation.py", line 720, in simulate
    self.simulate_power(project_life, lifetime_sim)
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/hybrid_simulation.py", line 630, in simulate_power
    self.dispatch_builder.simulate_power()
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/technologies/dispatch/hybrid_dispatch_builder_solver.py", line 387, in simulate_power
    self.simulate_with_dispatch(t)
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/technologies/dispatch/hybrid_dispatch_builder_solver.py", line 475, in simulate_with_dispatch
    self.solve_dispatch_model(start_time, n_days)
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/technologies/dispatch/hybrid_dispatch_builder_solver.py", line 117, in solve_dispatch_model
    solver_results = self.cbc_solve()
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/technologies/dispatch/hybrid_dispatch_builder_solver.py", line 233, in cbc_solve
    return HybridDispatchBuilderSolver.cbc_solve_call(self.pyomo_model,
  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/technologies/dispatch/hybrid_dispatch_builder_solver.py", line 225, in cbc_solve_call
    results = solver.solve(pyomo_model, options=solver_options.constructed)
  File "/Users/kbrunik/opt/anaconda3/envs/storage/lib/python3.8/site-packages/pyomo/opt/base/solvers.py", line 627, in solve
    raise ApplicationError("Solver (%s) did not exit normally" % self.name)
pyomo.common.errors.ApplicationError: Solver (cbc) did not exit normally

[kbrunik]

Issue found on branch: https://github.com/NREL/HOPP/tree/feature/offshore-h2

[dguittet]

Can you run this with logging?

Modify the line

  File "/Users/kbrunik/github/forked/HOPP/hopp/simulation/technologies/dispatch/hybrid_dispatch_builder_solver.py", line 225, in cbc_solve_call
    results = solver.solve(pyomo_model, options=solver_options.constructed)

to

    results = solver.solve(pyomo_model, options=solver_options.constructed, tee=True)

You should see a bunch of text starting with:

Welcome to the CBC MILP Solver 
Version: 2.10.10 
Build Date: Jun  7 2023 
...

[camirmas]

Bringing this back up as I've just encountered it too, should we pin the version to 2.10.8 until we figure this out? We know that version works

[dguittet]

@camirmas can you share the error output?