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Serial Number Tracking Information to Warehouse Shipment Line via API (Table 336 not Persisting)

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Posted on by AR-26091353-0

Hello everyone,

I’m trying to programmatically add item tracking information (specifically serial numbers) to a Warehouse Shipment Line record in Business Central.

Here’s what I’ve done and what I’m struggling with:

I attempted to insert records into Table 336 “Tracking Specification” through a custom codeunit.
The insert operation executes successfully, but the records do not appear in the UI (e.g., under “Line Tracking” in the Warehouse Shipment Line page).
Additionally, when I check the database, I can’t find any persisted record in Table 336 after insertion — even though, when I add tracking lines manually through the UI, the data is visible and remains there even after logout and login again.

This makes me suspect that the tracking information is stored in another related table or is being managed through a temporary or buffer table before being committed by a posting process or background function.

So, my questions are:

Which table(s) actually store the serial number tracking information for Warehouse Shipment Lines once it’s properly saved through the UI?
What is the correct way (or recommended API/codeunit) to programmatically create and persist serial number tracking entries that appear in the UI just like manually added ones?
If the data flows through multiple tables (e.g., temporary “Tracking Specification” buffers), could you please clarify the sequence or logic that moves data from temporary to permanent storage?

Any guidance or documentation reference on how Business Central handles item tracking persistence for warehouse documents would be greatly appreciated.

Thanks in advance,

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Dynamics 365 Business Central

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OussamaSabbouh 16,074 Super User 2026 Season 1 on at

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Hello,

Item tracking for warehouse shipments isn’t stored directly in Table 336; that table is temporary. When you add serial numbers through the UI, data is written to Table 337 (Reservation Entry). The Item Tracking Lines page shows a temporary 336 view combining 337 and posted entries. To add tracking programmatically, use Codeunit 6500 (Item Tracking Management) or open the standard Item Tracking Lines page so it commits to 337. Posting then reads from 337 to create item ledger entries. Direct inserts into 336 won’t persist or appear in the UI.

Regards,

Oussama

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Pallavi Phade 5,622 Super User 2026 Season 1 on at

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Namaste @AR-26091353-0

Kindly use Table 337 , Reservation Entry . This is where data gets stored . Tracking Specification is temporary page which gets displayed in item tracking lines .

Check Source Ref. no , Source no , Source Line no , "Positive", "Reservation status" Column . These feilds have important impact

If this helped , please mark answer as "Verified"

Regards

Pallavi Phade

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YUN ZHU 100,974 Super User 2026 Season 1 on at

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Hi, hope the following can give you some hints.

Dynamics 365 Business Central: How to create Item Tracking Lines automatically during an inbound transaction (Customization)

https://yzhums.com/7943/

PS: https://yzhums.com/wp-content/uploads/2023/12/ms-dynamics-nav-2013-item-tracking-wp-ap.pdf

Thanks.

ZHU

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Aman Kakkar 3,502 Super User 2026 Season 1 on at

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Hi,

The source table for "Item Tracking Lines" page is temporary -

As other experts suggested, you can can find the "Item Tracking Line" details in table 337 (Reservation Entry).

Hope this helps.

Aman K

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