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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / AX Kernel versions and...
Microsoft Dynamics AX (Archived)

AX Kernel versions and Installed models versions

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I have question regarding AX Kernel Version. I have AX 2012 R3 CU12 with GST2 installed. In my all system (Test, UAT, Pre-Prod) the Kernel version is 6.3.6000.4282 and Application version is 6.3.5000.133.
But If i am looking at all Installed Models , there is showing all hotfix installed with different versions but there is not any hotfix having version (6.3.6000.4282).
 So I was wondering something wrong with my system because i can see there many hotfix having version greater than my kernel version.
 So from where AX picks the kernel version? please suggest.

Thanks

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  • Suggested answer
    nmaenpaa Profile Picture
    nmaenpaa 101,160 Moderator on at
    RE: AX Kernel versions and Installed models versions

    Kernel version is not related to the models. Models are part of the application. Kernel is the runtime where the application runs.

    Actually the kernel version that you see in the About screen is the kernel version of your client.

    You can see AOS kernel version in Control panel - Programs - Programs and Features: Microsoft Dynamics AX 2012 Object Server.

    I think your kernel version should always be the same or higher than the application version: kernel is downwards compatible (can run application with same or lower version number) but not forward compatible.

    Also please note that all your binary components (AOS, client, SSRS component, SSAS component and so on) must be updated when you install kernel updates.

  • Community Member Profile Picture
    Community Member on at
    RE: AX Kernel versions and Installed models versions

    Thanks Nikolaos,

     I got that. So the next question would be why system showing Application Version (6.3.5000.133) but Installed models form has hotfix installed having greater version than AX system application version?

  • Verified answer
    nmaenpaa Profile Picture
    nmaenpaa 101,160 Moderator on at
    RE: AX Kernel versions and Installed models versions

    I think separate application hotfixes don't necessarily update the application version of the system. This is because the application hotfixes are not cumulative.

    Let's assume you have application version 6.3.5000.133.

    Let's assume there are three MS hotfixes with version numbers:

    6.3.5000.140

    6.3.5000.145

    6.3.5000.150

    You could install all of them, or just the last one. But if the application version was updated to 6.3.5000.150 it would not tell you any useful information about the installed hotfixes.

    So your application "status" has to be determined by combining the information of the application version, and all hotfixes that have higher version number than your application version.

    The "status" could be for example: 6.3.5000.133 with hotfixes 6.3.5000.145 and 6.3.5000.150.

    But if you install a Cumulative Update (CU), the application version will be updated.

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