Cbc

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Option '-threads 8' causes unpredictable hanging due to lock issue

10

I opened an issue on Python Pulp on this but they told it is related to CBC - see https://github.com/coin-or/pulp/issues/737 From Python-Pulp this is called ` C:\Python312\Lib\site-packages\pulp\solverdir\cbc\win\64\cbc.exe C:\Users\Michael\AppData\Local\Temp\9f2f4340f4914ba58ec92a8628688845-pulp.mps -threads 8...

mhechthz

How to use latest CBC solver in Python PULP on MacOS

1

I downloaded the file for MacOS, but I can't figure out how to use it in pulp model. Seems I need to find the CBC CMD, and replace the default...

cy1inder

Wrong result with current master build

3

Reference result with older version and cplex is 6497547. [value_6497547.lp.txt.gz](https://github.com/coin-or/Cbc/files/14297518/value_6497547.lp.txt.gz) ``` /local/ssd/cullmann/build/lpsolve.clpsolve/usr/bin/cbc test/value_6497547.lp Welcome to the CBC MILP Solver Version: trunk Build Date: Feb 15 2024 command line - test/value_6497547.lp...

christoph-cullmann

mipStart_ not copied in CbcModel copy constructor

1

A copy of the model is not initialized with the MIP start value of the original model

verflieger

I tried to exit the program by using ctrl+d in the command prompt. apparently that triggered some kind of loop that the program doesn't like. Was using the current version...

mmauksch

Bug: got Infeasible on obviously feasible problem

3

Hi! I think I discovered this bug on CBC using pulp: https://github.com/coin-or/pulp/issues/662 Here is my cbc version: ``` Version: 2.10.3 Build Date: Dec 15 2019 ``` Here is the problem...

etiennecallies

How should I read a sol file ? I understand lines correspond to variables but I am confused what each of the columns mean ; notably : - one column...

Vincent-Liagre-QB

Here is my problem ``` Lp_prob = p.LpProblem('Problem', sense = p.LpMinimize) x = p.LpVariable("x1", lowBound = 0) # Create a variable x y = p.LpVariable("x2", lowBound = 0) # Objective...

d-saikrishna

CBC solution status "Stopped on Time Limit" when it didn't actually reach the time limit

7

I set the solver time limit to 1200 seconds, but the solver is producing a "Stopped at Time Limit" status, but the solve time is only 739.64 seconds. See attached...

ebongo1

Discrepancy in config.guess between Releases and Master Branch

1

Hi, I noticed that the config.guess file in the releases of the project differs from the one present in the master branch. I want to understand what is the reason...

Xunop