Microsoft Dynamics AX Support

This blog contains posts by the Microsoft Dynamics AX Support Teams Worldwide

Form created in AX 2012 RTM or AX 2012 R2 with ManagedHost control on its design fails to open on AX 2012 R3

Applies to AX 2012 R2 & AX 2012 R3

Consider the following scenario:

When a form is created in AX 2012 RTM or AX 2012 R2 and a ManagedHost control is added on its design,

like “Microsoft.Dynamics.AX.Framework.Client.Controls.ChartToolBar”.

Then when the form is deployed on a newer AX version, e.g. AX 2012 R3 environment,

 the form no longer opens but throws the following exception:

Could not load file or assembly ‘Microsoft.Dynamics.AX.Framework.Client.Controls, Version=,
Culture=neutral, PublicKeyToken=31bf3856ad364e35′ or one of its dependencies.
The located assembly’s manifest definition does not match the assembly reference.

(Exception from HRESULT: 0x80131040)

To resolve the above addressed issue, especially in an upgrade scenario where many forms are affected, you can do the following:

Adding new assembly bindings into Ax32.exe.config to redirect and references to assembly.

Here is what precisely you need to do:

-Shutdown your AX client

-Find the “Ax32.exe.config” file under your Client\Bin directory, normally under

 “C:\Program Files (x86)\Microsoft Dynamics AX\60\Client\Bin”

-Edit the file in Notepad and add the following assembly binding (Highlighted in yellow).

-Save the file, but please make sure to keep it in the original format

-Start AX client and try your scenario 

The Ax32.exe.config file content will look like the following after the changes:


<?xml version=”1.0″ encoding=”utf-8″ ?>


    <startup useLegacyV2RuntimeActivationPolicy=”true”>

        <supportedRuntime version=”v4.0.30319″ />

        <requiredRuntime version=”v4.0.30319″ safemode=”true”/>



        <assemblyBinding xmlns=”urn:schemas-microsoft-com:asm.v1″>

            <probing privatePath=”EditorComponents”/>


                <assemblyIdentity name=”Microsoft.Dynamics.AX.Framework.Client.Controls”

                                                                   publicKeyToken=”31bf3856ad364e35″ culture=”neutral” />

                <bindingRedirect oldVersion=”″ newVersion=”″ />



                <assemblyIdentity name=”ste-net” publicKeyToken=”5542884f620dbde5″ culture=”neutral” />

                <bindingRedirect oldVersion=”″ newVersion=”″/>