On Monday, 19 July 2021 at 14:37:01 UTC, jmh530 wrote: > glpk can handle mixed integer programming problems. Since it is > a C library, it would be pretty easy to call from D but I don't > see a binding or anything available. I would try to call it > with dpp and if that doesn't work then something else like > dstep. Thanks. I'll take a look.