Pyomo/Eclipse/Gurobi Error

[stl...@gmail.com]

Hello,

I have a problem with Eclipse, Gurobi and Pyomo. I get the following error:

  File "C:\Anaconda3\lib\site.py", line 176

    file=sys.stderr)

        ^

SyntaxError: invalid syntax

ERROR: "[base]\site-packages\pyomo\opt\base\solvers.py", 570, solve

Solver (gurobi) returned non-zero return code (1)

ERROR: "[base]\site-packages\pyomo\opt\base\solvers.py", 573, solve

See the solver log above for diagnostic information.

Traceback (most recent call last):

  File "D:\Python\urbs_tree\runme.py", line 205, in <module>

    sce_number, current_sce_no)

  File "D:\Python\urbs_tree\runme.py", line 144, in run_scenario

    result = optim.solve(prob, tee=True)

  File "C:\Anaconda3\lib\site-packages\pyomo\opt\base\solvers.py", line 577, in solve

    "Solver (%s) did not exit normally" % self.name)

pyutilib.common._exceptions.ApplicationError: Solver (gurobi) did not exit normally

I use Windows 7 64bit and the following programms:

• Gruobi 6.5.1 (Windows 64bit)
• Anaconda 4.0.0 - Python 3.5.1 64bit
• Pyomo 4.3.11328
• Eclipse Mars 4.5.2
• PyDev 5.0.0

Is there anyone with an idea what is wrong?

Thanks

Thomas

[Gabriel Hackebeil]

What command are you running when this happens? Also, if there is a Pyomo script you are executing, would you mind sharing it with me (off of the forum)?

Gabe

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[stl...@gmail.com]

I use this commands:

    optim = SolverFactory('gurobi')

    optim = setup_solver(optim, logfile=log_filename)

    result = optim.solve(prob, tee=True) [At this line breaks]

The script which I use is open source and is located on Github  https://github.com/tum-ens/urbs. The problem is in the runme.py.

[Gabriel Hackebeil]

Is there any additional output from Gurobi that wasn’t included in your original email? It looks like setup_solver is adding a solver option that sets a logfile. Is there any helpful output in that file?

Gabe

On May 10, 2016, at 11:18 PM, stl...@gmail.com wrote:

optim = SolverFactory('gurobi')  # cplex, glpk, gurobi, ...

    optim = setup_solver(optim, logfile=log_filename)

    result = optim.solve(prob, tee=True)

https://github.com/tum-ens/urbs

[stl...@gmail.com]

def setup_solver(optim, logfile='solver.log'):

    """ """

    if optim.name == 'gurobi':

        # reference with list of option names

        # http://www.gurobi.com/documentation/5.6/reference-manual/parameters

        optim.set_options("logfile={}".format(logfile))

        # optim.set_options("timelimit=7200")  # seconds

        # optim.set_options("mipgap=5e-4")  # default = 1e-4

    elif optim.name == 'glpk':

        # reference with list of options

        # execute 'glpsol --help'

        optim.set_options("log={}".format(logfile))

        # optim.set_options("tmlim=7200")  # seconds

        # optim.set_options("mipgap=.0005")

    else:

        print("Warning from setup_solver: no options set for solver "

              "'{}'!".format(optim.name))

    return optim

There is unfortunatly no output file.

Thomas

[Gabriel Hackebeil]

It might be a Gurobi license issue. Can you launch the gurobi application (from the terminal or the desktop icon)?

Gabe

[stl...@gmail.com]

I can launch gurobi from the terminal. I tryed it with a floating license and a single academic license... 

The script works when I start it with the terminal. (python runme.py)

[leander...@gmail.com]

I have a simliar issue with pyomo - 4.3.11323 and Gurobi 6.0.4. When I run my program directly with a python interpreter, everything works fine. If I run it withina a taskmanager, I get the same ErrorMessage:

"Solver (gurobi) returned non-zero return code (1)" 

Did you have any solution for this issue?

Leander

[David Woodruff]

It still sounds like a license issue, but try looking at what gurobi is outputting by adding tee=true to your solve call. See:

https://software.sandia.gov/downloads/pub/pyomo/PyomoOnlineDocs.html#_display_of_solver_output