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ImportAsHolding failed with exception: Unexpected exception

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Posted on 11 Sep 2024 15:20:34 by 29
"When trying to deploy an update to the test environment from the development environment, I keep getting an error message that says, "ImportAsHolding failed with exception: Unexpected exception."
 
How do I troubleshoot this error? Is there somewhere I should focus? I successfully deployed several updates before this error came into play. Any assistance in terms of what to look for or what to try would be greatly appreciated.
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    Ammar Zaied Profile Picture
    Ammar Zaied 97 on 11 Sep 2024 at 16:23:15
    ImportAsHolding failed with exception: Unexpected exception

    The error message "ImportAsHolding failed with exception: Unexpected exception" usually indicates an issue during the solution import process in Power Platform, and there could be several reasons for this failure. Here's a structured approach to troubleshoot and resolve the issue:

    1. Check Solution Components

    • Corrupted or Incomplete Components: Ensure that no components (entities, fields, plugins, flows, etc.) in your solution are corrupted or incomplete. It could be that a newly added or modified component is causing the issue.
    • Dependent Components: Check if there are dependencies between components in the test environment and the ones you're importing. If there are unresolved dependencies, the import may fail.
    • Managed vs Unmanaged Solutions: Ensure that the type of solution (managed/unmanaged) is consistent between environments. Importing a managed solution over an unmanaged one (or vice versa) can cause issues.

    2. Examine the Import Log

    • During the import process, an error log is generated. Download the log file to get more details on the exact component or part of the solution causing the failure.
      1. Go to Settings → Solutions.
      2. After the import fails, there is an option to download the log file.
      3. Look for specific error messages, failed components, or unexpected exceptions in the log file.
    • The log will give you better insight into where exactly the failure occurs.

    3. Check for Plugin or Custom Code Issues

    • Plugin Errors: If there are plugins or custom workflows in your solution, ensure that they are functioning properly. Sometimes a plugin may have changed or the environment may lack the necessary assembly registration.
    • Check the Assembly Version: Ensure that any custom plugins or assemblies have the correct version deployed in the target environment. Mismatched versions between environments can cause issues.

    4. Investigate System Jobs

    • Go to the System Jobs section in both the test and development environments to look for any failed jobs or related error messages around the time of the import attempt. These could give you more context on what failed and why.

    5. Clear Solution Layers

    • Solution Layers: Sometimes, hidden solution layers can cause issues during import. If there are multiple layers in the target environment for the same components (due to previous imports), they could interfere with the new import.
      • You can use the Solution Layer Viewer in the Power Platform Admin Center to check for any conflicting layers and clean them up if needed.

    6. Patch Approach

    • If you are deploying a large update, try deploying it in smaller patches. Sometimes, deploying smaller solutions can help you pinpoint which part of the solution is causing the error.

    7. Environment-Specific Issues

    • Ensure that both environments (development and test) are on the same version of Dynamics 365 or Power Platform. Version mismatches can cause unexpected behaviors.
    • Also, check if there are any background processes in the test environment that could interfere with imports, such as custom workflows or system jobs running at the same time.

    8. Retry and Monitor

    • After identifying and fixing potential issues, try the import again. Monitor the environment for any additional warnings or errors during the process.

    By systematically going through these steps, you should be able to identify the underlying issue causing the "ImportAsHolding" error. Let me know if you need further clarification on any of these steps!

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