AX4 WCF Errors

The AX Business Connector is extremely useful for accessing AX functionality and data from external programs. The connector has been around for a number of years and is still going strong. When testing a custom service leveraging the AX 4 connector using the WCF Test Client provided with Visual Studio 2012, the following error appeared:

The remote server returned an error: NotFound.

Obviously this is not all that helpful. Editi the web.config file and enabling debugging:

   <behavior name="">
     <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
                <serviceMetadata httpGetEnabled="true" />
                <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                  <serviceDebug includeExceptionDetailInFaults="true" />
    <behavior name="AXServiceBehavior">
                <serviceMetadata httpGetEnabled="true" />
                <serviceDebug includeExceptionDetailInFaults="true" />

After an IISReset, a more informative error appeared:

Could not load file or assembly ‘Microsoft.Dynamics.BusinessConnectorNet’ or one of its dependencies. An attempt was made to load a program with an incorrect format.

Which was strange as the file is present in the GAC.

The solution:

AX 4.0 is getting a bit long in the tooth – running on operating systems in development environments released in 2012 is bound to cause issues.

• After installing the Business Connector, restart the server even if not prompted
• Ensure the IIS application pool running the service is a supported .NET version (4.0 works)
• Ensure the account running the application pool has the required AX access levels
• Ensure the custom application is compiled with ‘Any CPU’
• Ensure the application pool is set to support 32 bit applications. IIS –> Select the Application Pool –> Advanced Settings –> Enable 32-bit Applications


About John Winford

Based in Vancouver, Canada I’m an IT professional with a number of specialties. First and foremost I am the front-line between the business users I enable and the technical team I represent. Not content to simply push the paper I also get my ‘hands dirty’ when required. I have an extensive amount of experience with technical project management, ERP implementations, BI work, and development across SharePoint, CRM and generic Widows applications.
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