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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Business central Upgra...
Small and medium business | Business Central, N...
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Business central Upgrading Microsoft System and Base Application from 24 to Version 25

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Posted on by UK-22091119-0 8
Hello,
 
i am facing below this error while Data upgrade, let me know if anyone have solution for it. 
 
Error :- Invoke-NAVApplicationDatabaseConversion: Could not load file or assembly 'Microsoft.Bcl.AsyncInterfaces, Version=8.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. Could not find or load a specific file. (0x80131621)
 
 
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Dynamics 365 Business Central
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  • Suggested answer
    Rishabh Kanaskar Profile Picture
    Rishabh Kanaskar 2,242 on at
    Business central Upgrading Microsoft System and Base Application from 24 to Version 25
    Hi,
     
    This error usually occurs because the required assembly version isn’t present on the upgrade machine.
    Fix:
    > Install/update the Microsoft.Bcl.AsyncInterfaces NuGet package (v8.0.0) on the service tier machine.
    > Ensure your Business Central Administration Shell and server components are updated to the exact version of BC 25 before running Invoke-NAVApplicationDatabaseConversion.
    > Restart the service tier after installing the missing assembly and re-run the upgrade.
     
    Thanks
    Rishabh
  • Suggested answer
    Nimsara Jayathilaka. Profile Picture
    Nimsara Jayathilaka. 3,417 on at
    Business central Upgrading Microsoft System and Base Application from 24 to Version 25
    Hi
     
    Ensure that the Microsoft.Bcl.AsyncInterfaces assembly version 8.0.0.0 or compatible is properly installed and available in the environment where the upgrade is running. You can try updating or installing the required NuGet package for Microsoft.Bcl.AsyncInterfaces, or check the extensions and dependencies in your Business Central server installation. Sometimes, correcting your PowerShell environment to reference the correct Business Central modules and assemblies, and ensuring all platform components are up to date, resolves the issue.
     
    Thanks
    Nimsara
     

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