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Small and medium business | Business Central, N...
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generation has not been started error

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Posted on by 130
  • Suggested answer
    OussamaSabbouh Profile Picture
    20,395 Super User 2026 Season 2 on at

    Hello,

    This error is not related to the Job Queue; it is coming from the new Business Central v28 Dataverse mapping functionality, where BC can expose/map new Dataverse fields without creating an AL table extension. The message “Generation has not been started. Start generation first” indicates that the wizard’s Dataverse schema/field-generation step did not initialize correctly before you clicked Finish. I would close the wizard, verify the Dataverse connection is healthy, then return to Integration Table Mappings → select the mapping → Fields → New Field Mapping, refresh/reselect the Dataverse field and complete the wizard again; remember that Microsoft states newly added field mappings are initially Disabled, so enable them afterward and use Run Unconditional Full Synchronization if existing records must be updated. Also make sure you are on the latest v28 cumulative update. If the same message appears again—especially if the wizard never provides/starts the generation step—I would treat it as an issue in this relatively new v28 mapping feature and raise a Microsoft support case rather than modifying the mapping tables manually. 

    Regards,
    Oussama Sabbouh

  • Suggested answer
    YUN ZHU Profile Picture
    103,829 Super User 2026 Season 2 on at

    Hi, hope the following helps.

    Business Central 2026 release wave 1 (BC28): Map new Dataverse fields (New and custom Dataverse tables are readily available for mapping from the lookup on Integration Table column)

    https://yzhums.com/71914/

    Business Central 2024 wave 1 (BC24): Add table and field mappings to existing integration tables (Dataverse)

    https://yzhums.com/49260/

     

    Thanks.

    ZHU

  • Suggested answer
    Grigorios Mavrogeorgis Profile Picture
    3,712 Super User 2026 Season 2 on at

    Hi, that message on the wizard usually means the mapping fields were not generated yet, so the guide has nothing to finish with. On the Create New Integration Mappings page there is a step where the field list gets generated first, then Next, then Finish. If you jumped straight to Finish, or the page lost the previous step, that is exactly what you get. I would close it and walk the steps again from the start.

    The other thing I notice is your job queue behind it, plenty of Error and On Hold. Those on hold ones only wake up from changes in BC, changes on the Dataverse side don't restart them, so they can sit there forever looking fine. Check Integration Synchronization Errors first, the details there are usually clearer than the wizard message.

    This page has the troubleshooting side: https://learn.microsoft.com/en-us/dynamics365/business-central/admin-troubleshoot-sales-synchronization

     

    Glad to help - follow up if anything is unclear.   

    ►  If this solved it, marking it verified helps others too.       

    Regards,
    Grigorios Mavrogeorgis
    Business Central Consultant & AL Developer

    Work: Gmsoft Limited
    Blog:  insidebusinesscentral
    LinkedIn: linkedin.com/in/gregorymavrogeorgis

  • QN-03080613-0 Profile Picture
    130 on at

    @Grigorios Mavrogeorgis i tried a couple of times…. but after creating a custom integration table mapping and adding one or two fields …and then proceeding to next…and then when i click finish i  get this error…@OussamaSabbouh i tried use Run Unconditional Full Synchronization if existing records must be updated. but still this generation error is not getting fixed.

  • QN-03080613-0 Profile Picture
    130 on at

    this is the error message @YUN ZHU @QN-03080613-0 @OussamaSabbouh @Grigorios Mavrogeorgis 
    If requesting support, please provide the following details to help troubleshooting:

    Error message: 
    Generation has not been started. Start generation first.

    Internal session ID: 
    c0d4b546-ebc5-45e9-8fd3-0054501e1cf9

    Application Insights session ID: 
    f1cc7645-097c-4f5d-b21d-e0c2156cc519

    Client activity id: 
    4b511530-5a06-41d3-951d-a09138a331e3

    Time stamp on error: 
    2026-09-09T08:57:29.0513036Z

    User telemetry id: 
    c6155eee-e29c-437d-b2af-5285ea0d5da5

    AL call stack: 
    "Dataverse Table Builder Impl."(CodeUnit 2508).UpdateExistingTable line 6 - System Application by Microsoft version 28.4.53241.54101
    "Dataverse Table Builder"(CodeUnit 2507).UpdateExistingTable line 2 - System Application by Microsoft version 28.4.53241.54101
    "Man. Int. Field Mapping"(CodeUnit 5391).TryCreateRuntimeFields line 8 - Base Application by Microsoft version 28.4.53241.54183
    "CDS New Man. Int. Table Wizard"(Page 5384).CreateRuntimeFieldMappings line 8 - Base Application by Microsoft version 28.4.53241.54183
    "CDS New Man. Int. Table Wizard"(Page 5384).StoreRecordVar line 23 - Base Application by Microsoft version 28.4.53241.54183
    "CDS New Man. Int. Table Wizard"(Page 5384).FinishAction line 2 - Base Application by Microsoft version 28.4.53241.54183
    "CDS New Man. Int. Table Wizard"(Page 5384)."ActionFinish - OnAction"(Trigger) line 2 - Base Application by Microsoft version 28.4.53241.54183

     

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#1
OussamaSabbouh Profile Picture

OussamaSabbouh 740 Super User 2026 Season 2

#2
YUN ZHU Profile Picture

YUN ZHU 531 Super User 2026 Season 2

#3
Grigorios Mavrogeorgis Profile Picture

Grigorios Mavrogeorgis 310 Super User 2026 Season 2

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