I am using a community edition of AMPL.. I have an instance of MIP.. How can I obtain the reduced model after presolve without solving the problem? Unfortunately my instance is too large to be solved by CPLEX, Gurobi, etc (since I am using an AMPL community edition). I tried inserting the expand and solexpand commands after the model description - but they only export the original model, not the reduced (presolved) model. Any help will be great. Is solve really necessary before we can export the presolved model?
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