To disassociate a lower-level decision tree from an upper-level decision tree node, use the following steps:

1. Open the Decision Trees window.
2. In the Upper Level pane of the Selection tab, find the node that corresponds to the lower-level decision tree that will be disassociated from the upper-level decision tree.
3. Right-click the node found in the previous step and select Remove Tree.
4. Click the  icon to save the new information.