---
id: object/codeunit/1919
type: object
title: Codeunit 1919 "MigrationQB Data Reader"
summary: Codeunit 1919 "MigrationQB Data Reader" in QBMigration. 4 public procedures, 4 events, 4 event subscribers. Introduced in BC29, still in BC30.
tier: official
language: en
tags:
  - codeunit
  - qbmigration
versions:
  introduced: "29"
  last_changed: null
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 1c6478c67551590c0909bc45c698718ff651cd0f4354e259f75bd6fd48c43171
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/QBMigration/app/src/Support/MigrationQBDataReader.Codeunit.al
    title: src/Apps/W1/QBMigration/app/src/Support/MigrationQBDataReader.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects: []
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: codeunit
object_id: 1919
name: MigrationQB Data Reader
namespace: null
app: QBMigration
extends: null
first_version: "29"
last_version: "30"
present_in:
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 15
  events: 4
  subscribers: 4
relations:
  out: 1
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 4
  calls: 3
  called_by: 1
  implements: 0
---

# Codeunit 1919 "MigrationQB Data Reader"

> Codeunit 1919 "MigrationQB Data Reader" in QBMigration. 4 public procedures, 4 events, 4 event subscribers. Introduced in BC29, still in BC30.

QBMigration · BC29-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/QBMigration/app/src/Support/MigrationQBDataReader.Codeunit.al) · facts from BC29

## Properties

| Property | Value |
|---|---|
| TableNo | MigrationQB Config |

## Events published

- `OnZipFileMissing()` (integration)
  - subscribers: [Codeunit 1919 "MigrationQB Data Reader"](../codeunit/1919.md) OnZipFileMissingSubscriber
- `OnExtractFolderMissing()` (integration)
  - subscribers: [Codeunit 1919 "MigrationQB Data Reader"](../codeunit/1919.md) OnExtractFolderMissingSubscriber
- `OnEmptyZipFile()` (integration)
  - subscribers: [Codeunit 1919 "MigrationQB Data Reader"](../codeunit/1919.md) OnEmptyZipFileSubscriber
- `OnFileMissing()` (integration)
  - subscribers: [Codeunit 1919 "MigrationQB Data Reader"](../codeunit/1919.md) OnFileMissinggSubscriber

## Event subscriptions

- OnZipFileMissingSubscriber subscribes to Codeunit "MigrationQB Data Reader" OnZipFileMissing
- OnExtractFolderMissingSubscriber subscribes to Codeunit "MigrationQB Data Reader" OnExtractFolderMissing
- OnEmptyZipFileSubscriber subscribes to Codeunit "MigrationQB Data Reader" OnEmptyZipFile
- OnFileMissinggSubscriber subscribes to Codeunit "MigrationQB Data Reader" OnFileMissing

## Procedures

- `GetNumberOfAccounts(): Integer`
- `GetNumberOfItems(): Integer`
- `GetNumberOfCustomers(): Integer`
- `GetNumberOfVendors(): Integer`

Plus 3 local procedures.

## Triggers

OnRun

## Relations

- runs on [Table 1917 "MigrationQB Config"](../table/1917.md)

## 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 1917 "MigrationQB Helper Functions"](../codeunit/1917.md) (5 calls: `OnEmptyZipFileSubscriber → GetMigrationTypeTxt`, `OnExtractFolderMissingSubscriber → GetMigrationTypeTxt`, `OnFileMissinggSubscriber → GetMigrationTypeTxt`, …)
- [Codeunit 419 "File Management"](../codeunit/419.md) (5 calls: `UnzipFile → GetDirectoryName`, `UnzipFile → GetServerDirectoryFilesListInclSubDirs`, `UnzipFile → ServerCreateTempSubDirectory`, …)
- [Codeunit 9170 "Conf./Personalization Mgt."](../codeunit/9170.md) (1 call: `UnzipFile → ExtractZipFile`)

## Called by

- [Codeunit 1916 "MigrationQB Mgt"](../codeunit/1916.md) (5 calls: `CreateDataMigrationEntites → GetNumberOfAccounts`, `CreateDataMigrationEntites → GetNumberOfCustomers`, `CreateDataMigrationEntites → GetNumberOfItems`, …)

## Across versions

- Present in: BC29-30
- 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: "MigrationQB Data Reader")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.