Questions tagged [cbc]
The cbc tag has no usage guidance.
7
questions
3
votes
0answers
75 views
Extract/Inject Solutions (orig problem-space) during Search in MILP -> CoinOR Cbc
Task / Goal
I'm considering adding some customized problem-specific local-search component on top of a general-purpose MILP solver (= improvement heuristic).
The basic idea is the following:
All new ...
2
votes
0answers
68 views
Pyomo Trouble - Number of Constraints in Output is 0 When It Should Be > 5000
I have an MILP program written in Pyomo and I am using CBC as a solver. Below is a description of my problem:
The model works fine when it is run on my local computer
The output is the following in ...
4
votes
1answer
86 views
CBC stalling after approximately 10 seconds
I'm using CBC with PuLP to solve a small unit commitment problem. I'm finding that with certain combinations of input parameters, CBC simply stalls. With other input parameters, it solves, usually ...
7
votes
0answers
105 views
Provide basic solution to CLP
I'm using Pyomo to formulate an LP with approx 500,000 constraints and 200,000 decision variables. The LP is solved using CLP. Some instances fail to return even a feasible solution after many ...
4
votes
1answer
227 views
Best way to solve an allocation problem
I have the following problem: I have products with different attributes (price, weight, category) and I have a list of clients. Every client has an "affinity value" with every product, the ...
4
votes
1answer
119 views
Deterministic termination criteria for CBC
I'm running CBC on problems for which not always an integer solution can be found in a given time, so the command line option sec 120 is set (2 minutes maximum). ...
3
votes
1answer
142 views
Pyomo CBC 1.#j error
I am using to solve my model Pyomo/CBC combination. But rarely, CBC Gap shows 1.#j and pyomo generate an error. Hence, it doesn't get solution. How can I solve this problem?
Screen output:
...
