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Hello,
I'm wondering if I can feed Coluna with the initial solution that I generated from my meta-heuristic. I noticed that in the first iteration of Coluna, the dual bound is very bad (like -15000…
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Hello,
I'm trying to solve my model with Coluna, but I'm experiencing some problems.
First, how to use Coluna.Algorithm.ColCutGenConquer ? If I use the following code:
` coluna = optimizer…
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**Describe the bug**
In the problem I am solving, I use `ColumnGeneration()` as the top solver. However, it seems to terminate in around a minute even when the `PB` and `DB` are yet to converge.
`…
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**Describe the bug**
The following formulation seems stuck on an endless loop. The depth grows quickly (I reached 4000+ depth before stopping in 0.3.9), though there is only 55 variables. Unless I'm …
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**Describe the bug**
Simple decomposable MILP scheduling problem solves with `solver = Coluna.Algorithm.SolveIpForm()` in 1 second but fails with `solver = Coluna.Algorithm.TreeSearchAlgorithm()`.
…
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**Describe the bug**
Same model as in #557 but after having substituted 1:number_of_machines for the M axis. Also updated to Coluna v0.4.0#master. Model now runs with tree search but produces the f…
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**Is your feature request related to a problem? Please describe.**
According to the response by @guimarqu in #557 :
> You can use lower multiplicity and upper multiplicity. (5,5) if the solution s…
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**Describe the bug**
When solving my application with Coluna, some nodes are clearly infeasible (the dual bound value indicates that there are artificial variables in the master solution), but there …
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**Describe the bug**
When using Coluna to solve my application I get the following error after some nodes of the branch-and-price tree:
`ERROR: LoadError: The index MathOptInterface.VariableIndex(…
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**Describe the bug**
When trying to solve my application with coluna using Strong Branching with BestDualBoundStrategy and disabling Primal Heuristics I get the following error:
`
ERROR: LoadErro…