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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / Attempt by method '...
Microsoft Dynamics AX (Archived)

Attempt by method 'DynamicClass.TrueFalseHelper::TrueFalse(System.Object)' to access type xyz failed

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Posted on by ThomasWilke 766

Has anyone allready encountered the following error?

When I navigate through D365 i get this message on some forms. 

Attempt by method 'DynamicClass.TrueFalseHelper::TrueFalse(System.Object)' to access type 'Dynamics.AX.Application.Forms.CaseDetail+FormDataSource.CaseAssociation' failed.


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  • Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    I see that the error mentions Dynamics AX, so I changed the product from Other to Operations. Please make sure you always indicate which application you're talking about and consider asking in the Dynamics AX forum instead of this generic forum about all Dynamics 365 products. I can move it there if you wish.

    Also don't forget to add as much details as possible about the problem, such as what steps you did before running into the error.

  • ThomasWilke Profile Picture
    ThomasWilke 766 on at

    Hi Martin,

    yes please move it to the Dynamics AX forum.

    I get this message when navigating to caseDetails Form for my cases.

     0383.2017_2D00_03_2D00_17_5F00_0920.png

  • Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    Moved to the AX forum.

    Your picture shows that there are five infolog entries. What are the remaining four?

    Also, can you give us the whole call stack leading to the exception?

  • Verified answer
    ThomasWilke Profile Picture
    ThomasWilke 766 on at

    Thanks for the reply.

    we were able to identify the issue. It was an If statement that should check for a form datasource:

    if (args.getArg('eventArgs').formDataSource()) <-- code that created the issue

    fix:

    if (args.getArg('eventArgs').formDataSource() != null) <-- code that work's

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