I want to use pulp with COIN_CMD, but it does not work. For reference, PULP_CBC_CMD works fine, and cbc also works correctly from command line. Here is an example:
from pulp import *
solver = COIN_CMD()
# solver = PULP_CBC_CMD() # works fine
file_path = "seed.mps"
vars, prob = LpProblem.fromMPS(file_path)
prob.solve(solver)
status = LpStatus.get(prob.status)
print(f"Status: {status}")
output:
Welcome to the CBC MILP Solver
Version: Devel (unstable)
Build Date: Apr 7 2025
command line - /tmp/86b414af1de948e5bac2808cfcb3937b-pulp.mps -timeMode elapsed -branch -printingOptions all -solution /tmp/86b414af1de948e5bac2808cfcb3937b-pulp.sol (default strategy 1)
At line 2 NAME MODEL
At line 3 ROWS
At line 23 COLUMNS
At line 202 RHS
At line 221 BOUNDS
At line 240 ENDATA
Problem MODEL has 18 rows, 9 columns and 162 elements
Coin0008I MODEL read with 0 errors
Option for timeMode changed from cpu to elapsed
Total time (CPU seconds): 0.000299 (Wallclock seconds): 0.000605106
Status: Undefined
Was I using pulp wrong? Any suggestion is appreciated.
I want to use pulp with COIN_CMD, but it does not work. For reference, PULP_CBC_CMD works fine, and
cbcalso works correctly from command line. Here is an example:output:
Was I using pulp wrong? Any suggestion is appreciated.