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Redeploying a plug in after making changes cause System.BadImageFormatException Microsoft Dynamics 365 on-premise

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I have plugin that was originally build using 2017 and I am currently using 2019 to make changes to the code. The changes consist of adding more option-set to which was present in CRM but not in the plugin. And making true or false statement which copies over a option set field's Value to another option set field. I cleaned the project, rebuild it and used the Plugin Registering Tool to update the plugin. Since I have done so I am getting "Sdk.Sync.execute Error: System.BadImageFormatException: Microsoft Dynamics CRM has experienced an error" when I try to use the function in CRM. I also get "Sdk.Sync.execute Error: System.IO.DirectoryNotFoundException: Microsoft Dynamics CRM has experienced an error. " when I am using another function within CRM

Things I have tried so far:

  • The setting of Project for Platform target was set to Any CPU when I first redeployed it and I have tried redeploying it with x86 as well but it doesn't seem to be working
  • I have commented out the changes I made and redeployed it and it is still causing same error.
  • I had copy of old code so used 2017 visual studio to redeploy the unchanged plugin but still same error

I am not sure what to do. Any suggestion?

I have copy of this plugin in another environment, would just zipping the into solution and bring it over work to the environment I am working on be fine? I would ideally like to get to the bottom of why I am seeing this error. Any help will be greatly appreciated. 

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: Redeploying a plug in after making changes cause System.BadImageFormatException Microsoft Dynamics 365 on-premise

    Hi Blacksheep8,

    Maybe you can refer following thread:

    https://community.dynamics.com/365/sales/f/dynamics-365-for-sales-forum/299223/badimageformatexception-caused-by-the-early-bound-class-of-entities/862701 

    Regards,

    Leah Ju

    Please mark as verified if the answer is helpful. Welcome to join hot discussions in Dynamics 365 Forums.

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