Forum Discussion

charleshale's avatar
charleshale
Continued Contributor
6 months ago
Solved

ADBC Bug

The known bug here  https://support.fabric.microsoft.com/known-issues/?product=Power%2520BI&active=true&fixed=true&sort=... appears to be orthogonal to the main problem with respect to this mquery error: ADBC: Could not load file or assembly 'Apache.Arrow.Adbc.Telemetry.Traces.Listeners, Version=0.21.0.0, Culture=neutral, PublicKeyToken=204f54e5a45c07df' or one of its dependencies. The system cannot find the file specified."

The resolution steps of clearing cache and reinstalling desktop have not fixed the issue.    Eliminating GoogleBigQuery.Database([Implementation="2.0"])" with "=GoogleBigQuery.Database()" is not a tenable fix because the V2 treats JSON differently.   Eliminating V2 as a fix requires massive script rewrite

Need Help

8 Replies

  • v-menakakota's avatar
    v-menakakota
    Community Support
    6 months ago

    Hi charleshale ,

    Thanks for reaching out to the Microsoft fabric community forum. 

     

    We acknowledge that a related issue is listed under Known Issues however, the documented workaround does not fully resolve the ADBC assembly load error you are experiencing. The issue persists even after clearing cache and reinstalling Power BI Desktop, and reverting from GoogleBigQuery.Database([Implementation="2.0"]) is not a viable option due to functional differences in JSON handling.

     

    We recommend opening a Microsoft support ticket so the issue can be investigated further as a potential product defect in the context of your specific environment.

     

    Below is the link to help create Microsoft Support ticket:
    How to create a Fabric and Power BI Support ticket - Power BI | Microsoft Learn

     

    Best Regards, 
    Community Support Team

    • charleshale's avatar
      charleshale
      Continued Contributor
      6 months ago

      This a pure bug that happened in the Jan 2026 release related to the ADBC changes that applies to many users judging from the posts on reddit and fabric.   I can not penetrate past auto-support responses and wrong menu choices to get the bug submitted after following the instructions and spending an hour on it

      • charleshale's avatar
        charleshale
        Continued Contributor
        6 months ago

        We have powerbi embedded and an F2 capacity and still can't get support without buying a support plan, which we can not even do on site.  

  • charleshale's avatar
    charleshale
    Continued Contributor
    6 months ago

    Steps taken:

    1. On Power BI Desktop, click File > Options and settings > Options.
    2. Click Preview Feature.
    3. Select Use new Databricks connector implementations.
    4. Reboot 
    5. Manual run query in m query using Implementation = 2.0 (which has been the use case for these scripts

    We still get the error "Expression.Error: ADBC: Could not load file or assembly 'Apache.Arrow.Adbc.Telemetry.Traces.Listeners, Version=0.21.0.0, Culture=neutral, PublicKeyToken=204f54e5a45c07df' or one of its dependencies. The system cannot find the file specified."

    While the m query can run without Implementation = 2.0, doing that causes material problems since the Big Query JSON needs 2.0 to parse correctly