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AMPL > >Files and Preprocessing > >How can I prevent AMPL from transforming my problem?

To suppress the presolve phase, set option presolve 0.

To suppress transformation of piecewise-linear terms, set option pl_linearize 0.

To suppress elimination of variables by substitution from constraints, set option substout 0. (This is the default setting.) Substitutions specified within var declarations are always applied.

To see a summary of transformations performed, set option show_stats 1.

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