Rows Do Not Appear

• Make sure the Tree Nodes array has entries.
• Call Create Tree after setting Tree Nodes from Blueprint.
• Make sure parent rows are listed before child rows.
• Use Parent ID = 0 for root rows.

Child Rows Are Missing

• Check that each child's Parent ID points to the parent's 1-based position in Tree Nodes.
• Confirm the parent row is above the child row in the array.
• Expand the parent node or call Expand Tree Item from Blueprint.

Blueprint Functions Are Hard To Access

• Select the tree widget in the Designer.
• Enable Is Variable in Details.
• Compile the Widget Blueprint.
• Use the tree variable in the Graph to call Create Tree, Expand Tree Item, Collapse Tree Item, Toggle Node Expansion, or Select Tree Item.

Custom Row Widget Is Empty

• Assign your widget to Default Row Content, Row Contents By Parent, or Row Contents By Id.
• Bind On Generate Row.
• Cast the Row Widget output to your custom row widget Blueprint.
• Set your row widget's variables from the Row value.