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how to handle event subscriber obsolete in BC26 and replaced by new event subscriber?

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Posted on by YS-26050418-0

We have business central V25 and not wanted migrate to V26.

OnBeforePurchaseLineVerifyChange event subscriber in "Whse. Validate Source Line" codeunit is obsolete in bC26 and instead we have to use Codeunit::"Purchases Warehouse Mgt.", 'OnBeforePurchaseLineVerifyChange',. How can we do it?

The below code doesn't work and throwing error "The event 'OnBeforePurchaseLineVerifyChange' is not found in the target". My app.json is already set to application verion "26.0.0".

Any idea what is wrong here?

#if not CLEAN26
//BC25 present logic
[EventSubscriber(ObjectType::Codeunit, Codeunit::"Whse. Validate Source Line", 'OnBeforePurchaseLineVerifyChange', '', false, false)]
local procedure Codeunit5777_OnBeforePurchaseLineVerifyChange_Subscriber(var IsHandled: Boolean; var NewPurchLine: Record "Purchase Line"; var OldPurchLine: Record "Purchase Line")
var
begin
    IsHandled := true;
    // ...existing logic...
end;
#else
//BC26 and later
[EventSubscriber(ObjectType::Codeunit, Codeunit::"Purchases Warehouse Mgt.", 'OnBeforePurchaseLineVerifyChange', '', false, false)]
local procedure PurchasesWarehouseMgt_OnBeforePurchaseLineVerifyChange_Subscriber(var PurchaseLine: Record "Purchase Line"; xPurchaseLine: Record "Purchase Line"; var IsHandled: Boolean)
begin
    IsHandled := true;
    // ...move your custom logic here
end;
#endif
 


 

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Dynamics 365 Business Central

Dynamics 365 Business Central migration

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Sagar Dangar, MCP 783 Super User 2025 Season 2 on at

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how to handle event subscriber obsolete in BC26 and replaced by new event subscriber?

Hi,

Please download version 26 symbols in your extension and then add new event subscriber

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Khushbu Rajvi. 19,158 Super User 2025 Season 2 on at

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how to handle event subscriber obsolete in BC26 and replaced by new event subscriber?

Ensure your app.json targets "application": "26.0.0.0", download symbols, and clean the cache if needed.

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Sohail Ahmed 11,087 Super User 2025 Season 2 on at

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how to handle event subscriber obsolete in BC26 and replaced by new event subscriber?

Maybe this will help you resolve it quickly.

In Business Central 26, the OnBeforePurchaseLineVerifyChange event was moved from Codeunit 5777 (Whse. Validate Source Line) to Codeunit 1402 (Purchases Warehouse Mgt.). Your new subscriber is correct — but if you're getting an error like:

"The event 'OnBeforePurchaseLineVerifyChange' is not found in the target"

✅ Here’s what to do:

Download the latest symbols

Run this in VS Code terminal or Command Palette:

AL: Download Symbols

This ensures your environment references BC v26 and pulls in the new codeunits/events.

Ensure your app.json has the correct application version

"application": "26.0.0.0"

Use this subscriber code for BC 26+

[EventSubscriber(ObjectType::Codeunit, Codeunit::"Purchases Warehouse Mgt.", 'OnBeforePurchaseLineVerifyChange', '', false, false)] local procedure PurchasesWarehouseMgt_OnBeforePurchaseLineVerifyChange_Subscriber( var PurchaseLine: Record "Purchase Line"; xPurchaseLine: Record "Purchase Line"; var IsHandled: Boolean) begin IsHandled := true; // your custom logic end;

After downloading the latest symbols, the error should be resolved.

Mark below checkbox to make this answer Verified if it helps you.

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Gerardo Rentería Ga... 23,574 Most Valuable Professional on at

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how to handle event subscriber obsolete in BC26 and replaced by new event subscriber?

Hi, good day
I hope this can help you, and give you some hints.

Conditional Directives – CLEAN22 demystified – The BC Docs Librarian

Best Regards
Gerardo

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YUN ZHU 92,740 Super User 2025 Season 2 on at

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how to handle event subscriber obsolete in BC26 and replaced by new event subscriber?

So you use BC26 symbol files to develop BC25 extensions?

Although it is not recommended, if you don't want to upgrade, connect to the BC25 environment, re-download the symbol file, and only use the BC25 events.

Hope this helps.

Thanks.

ZHU

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