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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / Dynamics AX2009 callin...
Microsoft Dynamics AX (Archived)

Dynamics AX2009 calling 32 bit dll inside 64 bit instances of AOS

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Posted on by Community Member

Hello

My AOS is running on a 64bit machine. I need to run a class with property RunOn set to "Server"

The class calls a dll (x86) which is just a simple wrapper to a pretty old dll of an external company.

I always get an error:

ClrObject static method invocation error.

System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

Can someone please help?

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I have the same question (0)
  • Dick Wenning Profile Picture
    Dick Wenning 8,705 Moderator on at

    place the dll in the GAC, and try again.

  • Community Member Profile Picture
    Community Member on at

    sorry I forgot to mention...it is registered in GAC

  • Verified answer
    Brandon Wiese Profile Picture
    Brandon Wiese 17,788 on at

    In general you can not load a 32-bit DLL from a 64-bit process.  Windows itself goes through a lot of under the hood magic by having one DLL of each kind under either C:\Windows\System32 or C:\Windows\SysWOW64 and automatically swapping in the correct DLL regardless of the path used.

    I have solved this problem in the past by hosting my 32-bit DLL in a web service process, which you can make 32-bit, and then calling the web service from the AOS server tier.  This is also far more stable, as DLL's can be somewhat dangerous to load in-process with the AOS.  For example, one I have tried to use was not thread safe and required synchronization to use safely, and that's more headache on the AOS with semaphores and such than its worth.  Another one caused the AOS memory to bloat and the service to hang sporadically.  The web service approach protects your AOS from all of these problems.

    Good luck!

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