Package: pyomo
Version: 4.3.11327-1
Severity: normal
Pyomo crashes using the glp solver:
<cut>
$ pyomo solve --solver=glp diet1.py diet.dat --summary
Traceback (most recent call last):
File "/usr/bin/pyomo", line 9, in <module>
load_entry_point('Pyomo==4.3.11327', 'console_scripts', 'pyomo')()
File "/usr/lib/python3/dist-packages/pyomo/scripting/pyomo_main.py", line 83,
in main
retval = _options.func(_options, _unparsed)
File "/usr/lib/python3/dist-packages/pyomo/scripting/plugins/solve.py", line
181, in solve_exec
config = opt.config_block()
File "/usr/lib/python3/dist-packages/pyomo/opt/base/solvers.py", line 139, in
__getattr__
self._solver_error(attr)
File "/usr/lib/python3/dist-packages/pyomo/opt/base/solvers.py", line 153, in
_solver_error
+ "\n\toptions: %s" % ( self.options, ) )
RuntimeError: Attempting to use an unavailable solver.
The SolverFactory was unable to create the solver "glp"
and returned an UnknownSolver object. This error is raised at the point
where the UnknownSolver object was used as if it were valid (by calling
method "config_block").
The original solver was created with the following parameters:
type: glp
_args: ()
options: {}
</cut>
Until this is fixed, users can use the clc solver instead:
<cut>
$ pyomo solve --solver=cbc diet1.py diet.dat --summary
[ 0.00] Setting up Pyomo environment
[ 0.00] Applying Pyomo preprocessing actions
[ 0.00] Creating model
[ 0.08] Applying solver
[ 0.22] Processing results
Number of solutions: 1
Solution Information
Gap: 0.0
Status: optimal
Function Value: 2.81
Solver results file: results.yml
==========================================================
Solution Summary
==========================================================
Model unknown
Variables:
Buy : Size=9, Index=FOOD, Domain=NonNegativeIntegers
Key : Lower : Value : Upper : Fixed : Stale
1% Lowfat Milk : 0.0 : 1 : 20.0 : False : False
Big Mac : 0.0 : 0 : 20.0 : False : False
Filet-O-Fish : 0.0 : 1 : 20.0 : False : False
Fries, small : 0.0 : 1 : 20.0 : False : False
McGrilled Chicken : 0.0 : 0 : 20.0 : False : False
McLean Deluxe w Cheese : 0.0 : 0 : 20.0 : False : False
Orange Juice : 0.0 : 0 : 20.0 : False : False
Quarter Pounder w Cheese : 0.0 : 0 : 20.0 : False : False
Sausage McMuffin : 0.0 : 0 : 20.0 : False : False
Objectives:
Total_Cost : Size=1, Index=None, Active=True
Key : Active : Value
None : True : 2.81
Constraints:
Entree : Size=1
Key : Lower : Body : Upper
None : 1.0 : 1 : None
Side : Size=1
Key : Lower : Body : Upper
None : 1.0 : 1 : None
Drink : Size=1
Key : Lower : Body : Upper
None : 1.0 : 1 : None
[ 0.23] Applying Pyomo postprocessing actions
[ 0.23] Pyomo Finished
</cut>
Thanks,
DS
-- System Information:
Debian Release: stretch/sid
APT prefers testing
APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 4.4.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages pyomo depends on:
ii python3-appdirs 1.4.0-2
ii python3-nose 1.3.7-1
ii python3-ply 3.7-1
ii python3-pyutilib 5.3.2-1
ii python3-six 1.10.0-3
ii python3-yaml 3.11-3+b1
pn python3:any <none>
Versions of packages pyomo recommends:
ii coinor-cbc 2.8.12-1+b1
ii glpk-utils 4.58-2
pyomo suggests no packages.
-- no debconf information
