[SCIP] Reoptimization

[Marco Correia]

Hi,

I have a model I would like to solve, and then add a constraint and change
the objective, and then solve again. My understanding of the necessary
steps is:

1. SCIPenableReoptimization(true)
2. [Create and solve model]
3. SCIPfreeReoptSolve
4. SCIPfreeTransform
5. [Add new constraints and change objective]
6. [Solve modified model]

This doesn't seem to work as it is, but when omitting step 1 and 3 it
works. I guess the other steps are also important, right?

Thank you
Marco
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