---
id: object/codeunit/3684
type: object
title: Codeunit 3684 "BOM Tree Node"
summary: Codeunit 3684 "BOM Tree Node" in Base Application (Microsoft.Inventory.BOM.Tree). 8 public procedures. Present since at least BC23, still in BC30.
tier: official
language: en
tags:
  - codeunit
  - base application
versions:
  introduced: null
  last_changed: null
  deprecated: null
review:
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  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
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evidence:
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    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Inventory/BOM/Tree/BOMTreeNode.Codeunit.al
    title: src/Layers/W1/BaseApp/Inventory/BOM/Tree/BOMTreeNode.Codeunit.al (releases/29.x)
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    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
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  changes:
    - change/bcapps/9531
object_type: codeunit
object_id: 3684
name: BOM Tree Node
namespace: Microsoft.Inventory.BOM.Tree
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
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  - "24"
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  - "26"
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  - "28"
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
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counts:
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  procedures: 9
  events: 0
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relations:
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---

# Codeunit 3684 "BOM Tree Node"

> Codeunit 3684 "BOM Tree Node" in Base Application (Microsoft.Inventory.BOM.Tree). 8 public procedures. Present since at least BC23, still in BC30.

Base Application · Microsoft.Inventory.BOM.Tree · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Inventory/BOM/Tree/BOMTreeNode.Codeunit.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| Access | Internal |

## Procedures

- `Create(NewNodeContent: Codeunit "BOM Node")`
- `AddChild(Child: Codeunit "BOM Tree Node")`
- `TraverseDown(ParentNodeContent: Codeunit "BOM Node"; LineageKeys: List of [Text])`
- `TraverseDown()`
- `GetKey(): Text`
- `GetIsRootNode(): Boolean`
- `SetNotRootNode()`
- `IsChild(ChildKey: Text): Boolean`

Plus 1 local procedures.

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 3675 "BOM Tree Node Dictionary"](../codeunit/3675.md) (5 calls: `AddChild → Add`, `IsChild → ContainsKey`, `TraverseChildren → GetCurrent`, …)
- [Codeunit 3688 "BOM Node"](../codeunit/3688.md) (2 calls: `GetKey → GetKey`, `TraverseDown → TraversedDown`)

## Called by

- [Codeunit 3683 "BOM Tree Impl."](../codeunit/3683.md) (5 calls: `AddRelation → AddChild`, `AddRelation → Create`, `ChildHasKey → IsChild`, …)
- [Codeunit 3676 "BOM Tree Node Dictionary Impl."](../codeunit/3676.md) (1 call: `Add → GetKey`)

## Recent changes

- 2026-07-17 [#9531 [Master]- Report 152 "Calculate Low Level Code" terminates with error: "Cannot add instance as another with key %1 has already been added." after upgrade to v28.1](../../changes/bcapps/9531.md) (main, BC30, fix)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "codeunit", object_name: "BOM Tree Node")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.