fath: /* the current subproblem has been fathomed */
if (tree->parm->msg_lev >= GLP_MSG_DBG)
xprintf("Node %d fathomed\n", p);
/* freeze the current subproblem */
ios_freeze_node(tree);
/* and prune the corresponding branch of the tree */
ios_delete_node(tree, p); <------###########
/* if a new integer feasible solution has just been found, other
branches may become hopeless and therefore should be pruned */
if (mip->mip_stat == GLP_FEAS) cleanup_the_tree(tree);
Excuse me for my ignorance but i really don't understand by reading the reference how and which parameter