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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / Difference between ker...
Microsoft Dynamics AX (Archived)

Difference between kernel and application version

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Posted on by lally 8

Hi All ,

AX has two types like Kernal version and Application version .

What is teh difference between these two ?

Does these two values should be same ?

In which cases these values will not same and what would the reasons ?

If these values will not be same ...what will be impact on AX product ?

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  • Suggested answer
    Ludwig Reinhard Profile Picture
    Ludwig Reinhard Microsoft Employee on at

    Hi lally,

    This question has already asked several times before.

    Please have a look at the following threads and websites that explain things

    ax2009developer.blogspot.de/.../whats-de-difference-between-kernel.html

    community.dynamics.com/.../205215

    community.dynamics.com/.../120121

    Best regards,

    Ludwig

  • Suggested answer
    Mea_ Profile Picture
    Mea_ 60,284 on at

    Hi lally,

    Kernel version is a version of binaries and Application is version of x++ code, they could be different in case you installed binary hotfix. Please refer to this blog post for additional details blogs.msdn.microsoft.com/.../faq-microsoft-dynamics-ax-kernel-hotfixes

  • lally Profile Picture
    lally 8 on at

    Thanks ,

    Can you please explain that If these values will not be same ...what will be impact on AX product ?

  • Mea_ Profile Picture
    Mea_ 60,284 on at

    There is an answer on your question in the article from my previous post, but if you don't want to read it let me quote it for you

    Q8: Is it supported to have a different kernel and application build?

    YES, it is supported to have different builds for the application and the kernel BUT… they must be for the same version and service pack level.

    Our Product Group ensure that dependencies between the application and kernel are not introduced when creating AX hotfixes. Dependencies between the application and kernel builds can only be introduced in a new product version and a new service pack (NOT in a rollup/cumulative update).

    We also recommend having a kernel build that is the same or higher build than the application build. Applying a kernel update is normally a simpler process than updating the application code, so in the case of applying a cumulative update it makes sense to apply the kernel part of the update as well as the application part. This also ensures that you get the full benefit from any hybrid fixes, which as mentioned above require updates in both the kernel and application to function fully.

  • lally Profile Picture
    lally 8 on at

    Thanks ,

    Still i am will go my question as the above shared post does not have any information .

    Can you please explain that If these values will not be same ...what will be impact on AX product ?

    In simple terms ...i want to know what would be the impact if the values does not match ?

  • Verified answer
    Mea_ Profile Picture
    Mea_ 60,284 on at

    hm, I'm not really sure that my terms would be simpler. Kernel hotfix updates binaries of AOS service. There could be a bug like memory leak or something else that could cause a crash. To fix it you will have to install kernel hotfix and it will obviously update kernel version.

    From another side you can have a bug in x++ code that could be fixed by application hotfix. Different version of application and kernel is usual situation because you have more bugs in x++ code and install hotfixes often.

    As this article mentioned you may have some issues if you would install Application and Kernel from different product versions because they could have dependencies but generally it's not an issue and I have never seen one.

  • Ludwig Reinhard Profile Picture
    Ludwig Reinhard Microsoft Employee on at

    Hello lally,

    Is there anything left unanswered from your side?

    Otherwise it would be great if you could verify and close this thread.

    Many thanks,

    Ludwig

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