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This is my very first request for help, so please let me know if I screw things up.
I'm able to solve a basic convex NLP with Bonmin (1.8.8) no problem (using python 3.9.9). So I know I installed i…
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Gekko - APMonitor Optimization Suite is unable to solve an optimization problem. I am trying to solve Max a^Tx/b^Tx with the constraint d
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## Summary
I used Mindtpy to solve syn40m04m from the minlplib with gurobi as the mip solver and baron as the nlp solver and received a "this should never happen" error.
### Steps to reprodu…
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BONMIN with algorithm "B-Ecp" has a hard crash on a simple test integer program, which I had pulled from a larger MINLP that was having the same hard crash. The other algorithms are able to handle thi…
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Like in some no open source tools (LINGO) we have some another options to analze our model results:
![image](https://user-images.githubusercontent.com/20663547/209664964-470f397e-9e74-471b-b9b8-478…
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```
ERROR: type Symbol has no field head
Stacktrace:
[1] getproperty
@ ./Base.jl:42 [inlined]
[2] traverse_expr_linear_to_affine(expr::Symbol, lhscoeffs::Vector{Any}, lhsvars::Vector{Any}…
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This is one of the test failures observed in #161.
Running `git bisect` in the `idaes-pse` repo, between the commits:
- :heavy_check_mark: https://github.com/IDAES/idaes-pse/commit/ecf34fb (corr…
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```julia
julia> instance = "/nfs/optimi/kombadon/MINLP/instances/qplib/lp/QPLIB_9008.lp.gz"
julia> o = MOI.Utilities.Model{Float64}()
julia> MOI.read_from_file(o, instance)
ERROR: zlib err…
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In AmplNLWriter.Optimizer(Couenne_jll.amplexe)), both primal_status and termination_status show solutions are found. But both objective and decision variables are empty.
The issue was reported here…
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Hello,
I tried Bonmin and Couenne with AmplNLWriter on very simple problems. I find that:
- Bonmin works fine on NLPs, but Couenne may fail depending on the starting point.
- For 1 dimensional IL…