Hi, Current preconditioner IncompleteLUT sets the initialization flag m_isInitialized only in IncompleteLUT::compute. This makes the solve method assert if analyzePattern and factorize were called separately, e.g. not via compute. DiagonalPreconditioner sets the m_isInitialized flag in factorize, which should be a feasible solution for IncompleteLUT as well. best, simon
thank you for the report, fixed: default: https://bitbucket.org/eigen/eigen/commits/b9b2a5516325/ 3.2: https://bitbucket.org/eigen/eigen/commits/941725bff733/
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