[SCIP] Reoptimization

Marco Correia marco.v.correia at gmail.com
Tue Sep 28 12:55:09 CEST 2021


Sorry, what works is 2.4.5.6  (Including step 1 also leads to the above
error).

On Tue, Sep 28, 2021 at 11:53 AM Marco Correia <marco.v.correia at gmail.com>
wrote:

> Thanks Jakob,
>
> Step 4 is actually the only one that seems to work (that is 1,2,4,5,6
> works). Instead doing 1,2,3,5,6 gives me
>
> [cons.c:2399] ERROR: constraint handler <benderslp> already initialized
>
> in step 5.
>
> Am I missing some other step?
>
> On Tue, Sep 28, 2021 at 11:47 AM Witzig, Jakob <witzig at zib.de> wrote:
>
>> Hi Marco,
>>
>> Step 4 is not needed.
>>
>> Cheers,
>> Jakob
>>
>>
>> Am 28.09.2021 12:37 schrieb Marco Correia <marco.v.correia at gmail.com>:
>>
>> 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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