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Editorial Team
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Asked: 2026-06-11T11:53:05+00:00

Hi I am using Microsoft Solver Foundation to solve Linear Programming problem, but the

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Hi I am using Microsoft Solver Foundation to solve Linear Programming problem, but the variable has exceeded 1000, and it prompts following error:
{“Model size limit has been exceeded for this version of the product.
Please contact Microsoft Corporation for licensing options.\r\nLimits:
NonzeroLimit = 100000, MipVariableLimit = 2000, MipRowLimit = 2000,
MipNonzeroLimit = 10000, CspTermLimit = 25000, Expiration = none.”}

Is there a better solver that is efficient and can accept more than 1000 variables that could work in Visual Studio IDE? Thanks.

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  1. Editorial Team

    Not sure what you mean exactly by: the solver “could work in Visual Studio IDE?”

    However, if you want a large-scale (open-source) LP solver with a functional C# interface, I would recommend lp_solve, downloads are here. The solver is written in C/C++, but there is a comprehensive and easy-to-use C# wrapper which uses P/Invoke to call the various lpsolve methods.

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