TREEPRESOLVE_KEEPBASIS

Description

Determines what to do with the existing basis when re-presolving a node of the branch-and-bound tree.

Type

Integer

Values

0	The current basis is ignored and the LP relaxation of the presolved problem will be solved from scratch.
1	Attempt to presolve the current node basis and use it to warm-start the LP solve after the presolve. This can restrict some presolve reductions but should reduce the time for solving the LP relaxation.
2	Drop the basis during presolve, but attempt to create a valid warm-start basis based on the parent node solution.

Default value

-1

Affects routines