---
id: object/codeunit/1802
type: object
title: Codeunit 1802 "Data Migration Notifier"
summary: Codeunit 1802 "Data Migration Notifier" in Base Application (System.Integration). 11 public procedures, 2 events, 8 event subscribers. Present since at least BC23, still in BC30, changed in BC26-27.
tier: official
language: en
tags:
  - codeunit
  - base application
versions:
  introduced: null
  last_changed: "27"
  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: 0de1c1109d1288661a3b90dfc3b3f9b3a63f2958f8766678df285b1e529851e3
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/DataMigration/DataMigrationNotifier.Codeunit.al
    title: src/Layers/W1/BaseApp/System/DataMigration/DataMigrationNotifier.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: 1802
name: Data Migration Notifier
namespace: System.Integration
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in:
  - "26"
  - "27"
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 25
  events: 2
  subscribers: 8
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 5
  called_by: 0
  implements: 0
---

# Codeunit 1802 "Data Migration Notifier"

> Codeunit 1802 "Data Migration Notifier" in Base Application (System.Integration). 11 public procedures, 2 events, 8 event subscribers. Present since at least BC23, still in BC30, changed in BC26-27.

Base Application · System.Integration · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/System/DataMigration/DataMigrationNotifier.Codeunit.al) · facts from BC29

## Events published

- `SkipShowingCustomerContactCreationNotification(var SkipNotification: Boolean)` (integration)
- `SkipListEmptyNotification(TableId: Integer; var SkipNotification: Boolean)` (integration)

## Event subscriptions

- OnCustomerListOpen subscribes to Page "Customer List" OnOpenPageEvent
- OnVendorListOpen subscribes to Page "Vendor List" OnOpenPageEvent
- OnItemListOpen subscribes to Page "Item List" OnOpenPageEvent
- OnGetInstructionsSubscriber subscribes to Table "Data Migrator Registration" OnGetInstructions
- OnCustomerListGetCurrRec subscribes to Page "Customer List" OnAfterGetCurrRecordEvent
- OnCustomerCardGetCurrRec subscribes to Page "Customer Card" OnAfterGetCurrRecordEvent
- OnVendorListGetCurrRec subscribes to Page "Vendor List" OnAfterGetCurrRecordEvent
- OnVendorCardGetCurrRec subscribes to Page "Vendor Card" OnAfterGetCurrRecordEvent

## Procedures

- `RemoveCustomerEmptyListNotification(ListEmptyNotification: Notification)`
- `RemoveVendorEmptyListNotification(ListEmptyNotification: Notification)`
- `RemoveItemEmptyListNotification(ListEmptyNotification: Notification)`
- `OpenDataMigrationWizard(ListEmptyNotification: Notification)`
- `RunCreateContactsFromCustomersReport(ListEmptyNotification: Notification)`
- `RunCreateContactsFromVendorsReport(ListEmptyNotification: Notification)`
- `RemoveCustomerContactNotification(ListEmptyNotification: Notification)`
- `RemoveVendorContactNotification(ListEmptyNotification: Notification)`
- `CheckCustVendNotificationIdEnabled(SourceTableID: Integer): Guid`
- `ShowContactNotificationIfCustWithoutContExist()` (obsolete 27.0: This is very non-performant code. Existing callers should implement a query instead.)
- `ShowContactNotificationIfVendWithoutContExist()` (obsolete 27.0: This is very non-performant code. Existing callers should implement a query instead.)

Plus 4 local procedures.

## Triggers

OnRun

## 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 1798 "Data Migration Mgt."](../codeunit/1798.md) (15 calls: `CheckCustVendNotificationIdEnabled → GetCustomerContactNotificationId`, `CheckCustVendNotificationIdEnabled → GetVendorContactNotificationId`, `RemoveCustomerContactNotification → GetCustomerContactNotificationId`, …)
- [Codeunit 701 "Data Type Management"](../codeunit/701.md) (1 call: `ShowListEmptyNotification → GetRecordRef`)
- [Page 1808 "Data Migration Wizard"](../page/1808.md) (1 call: `OpenDataMigrationWizard → (object)`)
- [Report 5194 "Create Conts. from Vendors"](../report/5194.md) (1 call: `RunCreateContactsFromVendorsReport → (object)`)
- [Report 5195 "Create Conts. from Customers"](../report/5195.md) (1 call: `RunCreateContactsFromCustomersReport → (object)`)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC26-27

## Deprecations

- procedure ShowContactNotificationIfCustWithoutContExist: Pending 27.0 (#if not CLEAN27), "This is very non-performant code. Existing callers should implement a query instead."
- procedure ShowContactNotificationIfVendWithoutContExist: Pending 27.0 (#if not CLEAN27), "This is very non-performant code. Existing callers should implement a query instead."

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: "Data Migration Notifier")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.