New system events replace Codeunit 1 in Business Central October’18 release


When you start upgrading to Business Central on-premises, you'll notice that Codeunit 1 ApplicationManagement is missing. Not to worry, this is not a ‘bug’, it is by design. We're refactoring the application as part of our move to modern development and to enable extensions to subscribe to events that were formerly handled by functions in codeunit 1.

The old ApplicationManagement codeunit has been retired, and new ‘system’ codeunits have been introduced in the 2 billion range.

These special codeunits are created by C/SIDE when a database is created so you will always have them, compiled, and ready to go. These new system codeunits do not contain code, all they contain are event publishers. Business Central Server will now call these event publishers instead of calling the respective functions in Codeunit 1 ApplicationManagement directly.

We have added subscribers to these new business events in various places in the application code to ensure all the functionality still works as before, no functionality was removed. Most of the real business logic was already moved out of the ApplicationManagement codeunit so these subscribers were added where the business logic really resides. The integration events were also moved from Codeunit 1 to their respective new homes.

You can find a detailed mapping of where each function moved in the table at the end of this blog post, and of course it will be part of the docs for the release of Business Central October'18. The list will be in the upgrade docs, so stay tuned for the update of the developer and ITPro docs!

The new ‘system’ codeunits are special in more ways than one. You will not be able to customize them as you would other codeunits. You also should not directly subscribe to the events in these codeunits either. While technically possible as of now, we will block this in the future which would be a breaking change for you. Instead you should subscribe to one of the integration events which now reside next to the business logic. The reason for this is to ensure the correct ordering of events and to provide before/after events where appropriate.

Of course this is a big change in how the server interacts with the application and you will need to adjust your customizations and extensions to this new way of working. You can find help and more information on how to do technical upgrade in the developer and ITPro docs for Business Central October'18 release.

Which functions become which events?

The following table describes the mapping from codeunit 1 to the new events:

Codeunit 1 function name New object type New object ID New object name New function name
CompanyOpen Codeunit 40 LogInManagement CompanyOpen
GetSystemIndicator Codeunit 40 LogInManagement GetSystemIndicator
CompanyClose Codeunit 40 LogInManagement CompanyClose
FindPrinter Codeunit 44 ReportManagement GetPrinterName
ApplicationVersion Codeunit 9015 Application System Constants ApplicationVersion
CustomApplicationVersion N/A N/A N/A N/A
ReleaseVersion Codeunit 9015 Application System Constants ReleaseVersion
ApplicationBuild Codeunit 9015 Application System Constants ApplicationBuild
CustomApplicationBuild N/A N/A N/A N/A
ApplicationLanguage Codeunit 43 LanguageManagement ApplicationLanguage
DefaultRoleCenter Codeunit 9170 Conf./Personalization Mgt. DefaultRoleCenterID
MakeDateTimeText Codeunit 41 TextManagement MakeDateTimeText
GetSeparateDateTime Codeunit 41 TextManagement GetSeparateDateTime
MakeDateText Codeunit 41 TextManagement MakeDateText
MakeTimeText Codeunit 41 TextManagement MakeTimeText
MakeText Codeunit 41 TextManagement MakeText
MakeDateTimeFilter Codeunit 41 TextManagement MakeDateTimeFilter
MakeDateFilter Codeunit 41 TextManagement MakeDateFilter
MakeTextFilter Codeunit 41 TextManagement MakeTextFilter
MakeCodeFilter Codeunit 41 TextManagement MakeTextFilter
MakeTimeFilter Codeunit 41 TextManagement MakeTimeFilter
AutoFormatTranslate Codeunit 45 AutoFormatManagement AutoFormatTranslate
ReadRounding Codeunit 45 AutoFormatManagement ReadRounding
CaptionClassTranslate Codeunit 42 CaptionManagement CaptionClassTranslate
GetCueStyle Codeunit 9701 Cue Setup GetCueStyle
SetGlobalLanguage Codeunit 43 LanguageManagement SetGlobalLanguage
ValidateApplicationlLanguage Codeunit 43 LanguageManagement ValidateApplicationLanguage
LookupApplicationlLanguage Codeunit 43 LanguageManagement LookupApplicationLanguage
GetGlobalTableTriggerMask Codeunit 49 GlobalTriggerManagement GetGlobalTableTriggerMask
OnGlobalInsert Codeunit 49 GlobalTriggerManagement OnGlobalInsert
OnGlobalModify Codeunit 49 GlobalTriggerManagement OnGlobalModify
OnGlobalDelete Codeunit 49 GlobalTriggerManagement OnGlobalDelete
OnGlobalRename Codeunit 49 GlobalTriggerManagement OnGlobalRename
GetDatabaseTableTriggerSetup Codeunit 49 GlobalTriggerManagement GetDatabaseTableTriggerSetup
OnDatabaseInsert Codeunit 49 GlobalTriggerManagement OnDatabaseInsert
OnDatabaseModify Codeunit 49 GlobalTriggerManagement OnDatabaseModify
OnDatabaseDelete Codeunit 49 GlobalTriggerManagement OnDatabaseDelete
OnDatabaseRename Codeunit 49 GlobalTriggerManagement OnDatabaseRename
OnDebuggerBreak Codeunit 9500 Debugger Management ProcessOnDebuggerBreak
LaunchDebugger Codeunit 9500 Debugger Management OpenDebugger
OpenSettings Codeunit 9170 Conf./Personalization Mgt. OpenSettings
OpenContactMSSales Codeunit 50 SaaS Log In Management OpenContactMSSales
InvokeExtensionInstallation Codeunit 2501 ExtensionMarketplaceMgmt InvokeExtensionInstallation
CustomizeChart Codeunit 9180 Generic Chart Mgt CustomizeChart
HasCustomLayout Codeunit 44 ReportManagement HasCustomLayout
MergeDocument Codeunit 44 ReportManagement MergeDocument
ReportGetCustomRdlc Codeunit 44 ReportManagement ReportGetCustomRdlc
ReportScheduler Codeunit 44 ReportManagement ScheduleReport
OnBeforeOpenSettings Codeunit 9170 Conf./Personalization Mgt. OnBeforeOpenSettings
OnAfterGetApplicationVersion Codeunit 9015 Application System Constants OnAfterGetApplicationVersion
OnBeforeCompanyOpen Codeunit 40 LogInManagement OnBeforeCompanyOpen
OnAfterCompanyOpen Codeunit 40 LogInManagement OnAfterCompanyOpen
OnRoleCenterOpen Codeunit 9170 Conf./Personalization Mgt. OnRoleCenterOpen
OnBeforeCompanyClose Codeunit 40 LogInManagement OnBeforeCompanyClose
OnAfterCompanyClose Codeunit 40 LogInManagement OnAfterCompanyClose
OnAfterGetSystemIndicator Table 79 Company Information OnAfterGetSystemIndicator
OnAfterFindPrinter Codeunit 44 ReportManagement OnAfterGetPrinterName
OnAfterGetDefaultRoleCenter Codeunit 9170 Conf./Personalization Mgt. OnAfterGetDefaultRoleCenter
OnAfterMakeDateText N/A N/A N/A N/A
OnAfterMakeTimeText N/A N/A N/A N/A
OnAfterMakeText N/A N/A N/A N/A
OnAfterMakeDateTimeFilter Codeunit 41 TextManagement OnAfterMakeDateTimeFilter
OnAfterMakeDateFilter Codeunit 41 TextManagement OnAfterMakeDateFilter
OnAfterMakeTextFilter Codeunit 41 TextManagement OnAfterMakeTextFilter
OnAfterMakeCodeFilter N/A N/A N/A N/A
OnAfterMakeTimeFilter Codeunit 41 TextManagement OnAfterMakeTimeFilter
OnAfterAutoFormatTranslate Codeunit 45 AutoFormatManagement OnAfterAutoFormatTranslate
OnAfterCaptionClassTranslate Codeunit 42 CaptionManagement OnAfterCaptionClassTranslate
OnAfterGetGlobalTableTriggerMask Codeunit 49 GlobalTriggerManagement OnAfterGetGlobalTableTriggerMask
OnAfterOnGlobalInsert Codeunit 49 GlobalTriggerManagement OnAfterOnGlobalInsert
OnAfterOnGlobalModify Codeunit 49 GlobalTriggerManagement OnAfterOnGlobalModify
OnAfterOnGlobalDelete Codeunit 49 GlobalTriggerManagement OnAfterOnGlobalDelete
OnAfterOnGlobalRename Codeunit 49 GlobalTriggerManagement OnAfterOnGlobalRename
OnAfterGetDatabaseTableTriggerSetup Codeunit 49 GlobalTriggerManagement OnAfterGetDatabaseTableTriggerSetup
OnAfterOnDatabaseInsert Codeunit 49 GlobalTriggerManagement OnAfterOnDatabaseInsert
OnAfterOnDatabaseModify Codeunit 49 GlobalTriggerManagement OnAfterOnDatabaseModify
OnAfterOnDatabaseDelete Codeunit 49 GlobalTriggerManagement OnAfterOnDatabaseDelete
OnAfterOnDatabaseRename Codeunit 49 GlobalTriggerManagement OnAfterOnDatabaseRename
OnAfterHasCustomLayout Codeunit 44 ReportManagement OnAfterHasCustomLayout
OnAfterReportGetCustomRdlc Table 9650 Custom Report Layout OnAfterReportGetCustomRdlc
OnBeforeOnDatabaseInsert Codeunit 49 GlobalTriggerManagement OnBeforeOnDatabaseInsert
OnBeforeOnDatabaseModify Codeunit 49 GlobalTriggerManagement OnBeforeOnDatabaseModify
OnBeforeOnDatabaseDelete Codeunit 49 GlobalTriggerManagement OnBeforeOnDatabaseDelete
OnBeforeOnDatabaseRename Codeunit 49 GlobalTriggerManagement OnBeforeOnDatabaseRename
OnEditInExcel Codeunit 6710 ODataUtility OnEditInExcel
OnInstallAppPerDatabase N/A N/A N/A N/A
OnInstallAppPerCompany N/A N/A N/A N/A
OnCheckPreconditionsPerDatabase Codeunit 9900 Data Upgrade Mgt. OnCheckPreconditionsPerDatabase
OnCheckPreconditionsPerCompany Codeunit 9900 Data Upgrade Mgt. RaiseOnCheckPreconditionsPerCompany
OnUpgradePerDatabase Codeunit 9900 Data Upgrade Mgt. OnUpgradePerDatabase
OnUpgradePerCompany Codeunit 9900 Data Upgrade Mgt. OnUpgradePerCompany
OnValidateUpgradePerDatabase Codeunit 9900 Data Upgrade Mgt. OnValidateUpgradePerDatabase
OnValidateUpgradePerCompany Codeunit 9900 Data Upgrade Mgt. OnValidateUpgradePerCompany


19. September 2018: The table has been updated with object names so the new functions are more easily found in the Business Central development environment.

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