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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / Failed to load assembl...
Microsoft Dynamics AX (Archived)

Failed to load assembly error when trying to use .NET assembly in AX 4.0

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Posted on by syed baber 11,633

Hi All,

I am trying to use .NET assembly in AX 4.0. I have imported the .NET assembly reference from XPO file and it imported successfully and showing under AOT->References node. I have added the .NET assembly in GAC on both client and AOS machines. But I am unable to use it in X++ code and getting compile errors "The table does not contain this field". I am using the fully qualified name like namespace.classname. Also, when I try to compile the whole project, I am getting error "Failed to load assembly". I have verified all the attributes of the assembly showing in AX and GAC and all are same. Can anyone please let me know what I might be missing here?

Thanks.

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I have the same question (0)
  • syed baber Profile Picture
    syed baber 11,633 on at

    The .NET assembly reference has been added on USR layer.

  • Martin Dráb Profile Picture
    Martin Dráb 237,795 Most Valuable Professional on at

    Was the assembly built for the right version of .NET (I think it should be .NET 2.0 in this case) and processor architecture (Any CPU or x86)?

  • syed baber Profile Picture
    syed baber 11,633 on at

    Hi Martin,

    Assembly has been built with .NET version 2.0 and process architecture is showing as MSIL.

  • Suggested answer
    Martin Dráb Profile Picture
    Martin Dráb 237,795 Most Valuable Professional on at

    The problem may be in a dependency - review that all libraries needed by your assembly have been installed too.

    If it doesn't help, use Assembly Binding Log Viewer.

  • syed baber Profile Picture
    syed baber 11,633 on at

    Hi Martin,

    I managed to get it working by adding the reference in AX 2009 and import it back in AX 4.0, but in AX 4.0, now I am getting error that "The class "xx" does not contain this function, when I am trying to call the method showing in the drop down. What could be the problem here. What I need to change related to this method in .NET?

  • syed baber Profile Picture
    syed baber 11,633 on at

    I got it resolved. I was not passing the correct number of arguments in the method, so it was complaining that the method not found contrary to X++ in which case we get the errors Argument "xx" is incompatible with the required type. When calling a method inside a dll, it was trying to find the overloaded version of the method because of different number of arguments in the method.

    Thanks,
    Baber.

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