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# XPRSremovecbnodelpsolved

Purpose
Removes a node callback function previously added by XPRSaddcbnodelpsolved. The specified callback function will no longer be called after it has been removed.
Topic areas
Callback, Branch and Bound Search
Synopsis
`int XPRS_CC XPRSremovecbnodelpsolved(XPRSprob prob, void (XPRS_CC *nodelpsolved)(XPRSprob my_prob, void *my_object), void* data);`
Arguments

prob | The current problem.
nodelpsolved | The callback function to remove. If NULL then all node-optimal callback functions added with the given user-defined data value will be removed.
data | The data value that the callback was added with. If NULL, then the data value will not be checked and all node-optimal callbacks with the function optnode will be removed.

Further information
1. This callback is fired only for the first continuous relaxation solve of each node (including the root) in a MIP branch-and-bound search, and only if the continuous relaxation is feasible and solved to optimality.
2. It is allowed to tighten the local node bounds and add or remove cutting planes from within this callback, but the callback will not be fired again in case such modifications triggers a resolve of the continuous relaxation of the node.
Related topics
XPRSaddcbnodelpsolved
Parent Topic Console and Library Functions

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