Originally posted by: skkim

Hi, all. I have a function that only executes at the root node, so I would like to create something like

BranchCallBack1() {

}

It is giving me the following error: no match for 'operator!=' in 'nodeId == 0'

How can I make this work? Or How can I let callback function know the process at the root node?

At the root node the callback's getNnodes() function should return 0. This should be good enough to identify the root node.

if nothing else helps: The NodeId::_id field is publicly visible (see ilocplexi.h) so you can directly test this field. Not nice, not future proof, but should work as well.

Originally posted by: skkim

Good!!! Why didn't I think trying getNnodes()? Thanks.