[SCIP] Installation Problem on Windows

[Cokyasar, Taner]

Hi,

I am trying to solve a nonlinear problem using the Jupyter Notebook interface to Python 3.7 via Ipopt through Pyomo modeling method.

Unfortunately, Ipopt could not solve my problem, and I started to look at alternative options.

I tried to install SCIP following instructions on here<https://www.scipopt.org/index.php#download>. Then, I tried to use it with Pyomo as follows (shown bold) and received the following error. Can you please help me get going with it?

opt = SolverFactory('scip', executable = C:/Program Files/SCIPOptSuite 7.0.2/bin/scip “
results = opt.solve(m, tee=True)


invalid parameter <C:\Users\TCOKYA~1\AppData\Local\Temp\tmp25pw_oxr.pyomo.nl>
invalid parameter <-AMPL>

syntax: C:\Program Files\SCIPOptSuite 7.0.2\bin\scip.exe [-l <logfile>] [-q] [-s <settings>] [-r <randseed>] [-f <problem>] [-b <batchfile>] [-c "command"]
  -v, --version : print version and build options
  -l <logfile>  : copy output into log file
  -q            : suppress screen messages
  -s <settings> : load parameter settings (.set) file
  -f <problem>  : load and solve problem file
  -o <primref> <dualref> : pass primal and dual objective reference values for validation at the end of the solve
  -b <batchfile>: load and execute dialog command batch file (can be used multiple times)
  -r <randseed> : nonnegative integer to be used as random seed. Has priority over random seed specified through parameter settings (.set) file
  -c "command"  : execute single line of dialog commands (can be used multiple times)

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-27-5b246395f577> in <module>
     10     opt = SolverFactory('{}'.format(solver_name))
     11 # print(opt.solve(m))
---> 12 results = opt.solve(m, tee=True)
     13 ### END SOLVING THE PROBLEM ###

~\Anaconda3\lib\site-packages\pyomo\opt\base\solvers.py in solve(self, *args, **kwds)
    603                 print("      %6.2f seconds required for solver" % (solve_completion_time - presolve_completion_time))
    604
--> 605             result = self._postsolve()
    606             result._smap_id = self._smap_id
    607             result._smap = None

~\Anaconda3\lib\site-packages\pyomo\solvers\plugins\solvers\SCIPAMPL.py in _postsolve(self)
    168
    169     def _postsolve(self):
--> 170         results = super(SCIPAMPL, self)._postsolve()
    171         if results.solver.message == "unknown":
    172             results.solver.status = \

~\Anaconda3\lib\site-packages\pyomo\opt\solver\shellcmd.py in _postsolve(self)
    268
    269         if self._results_format is not None:
--> 270             results = self.process_output(self._rc)
    271             #
    272             # If keepfiles is true, then we pop the

~\Anaconda3\lib\site-packages\pyomo\opt\solver\shellcmd.py in process_output(self, rc)
    348                 results = self._results_reader(self._results_file,
    349                                                res=results,
--> 350                                                suffixes=self._suffixes)
    351             results_reader_completion_time = time.time()
    352             if self._report_timing is True:

~\Anaconda3\lib\site-packages\pyomo\opt\plugins\sol.py in __call__(self, filename, res, soln, suffixes)
     44         """
     45         try:
---> 46             with open(filename,"r") as f:
     47                 return self._load(f, res, soln, suffixes)
     48         except ValueError as e:

FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\TCOKYA~1\\AppData\\Local\\Temp\\tmp25pw_oxr.pyomo.sol'

Best regards,
_____________________________________________________________________
Taner Cokyasar, Ph.D.
Postdoctoral Appointee Transportation System Modeler
Energy Systems Division | Argonne National Laboratory
9700 S. Cass Avenue, Lemont, IL 60439<https://goo.gl/maps/T1VuNPs75J93fn2q9>

President – Student Leadership Board
Logistics and Supply Chain Division | Institute of Industrial & Systems Engineers
_____________________________________________________________________
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