Unable to connect to the AOS specified in the AX Client Configuration in SSRS

Today, I faced a really weird issue while designing a report in VS2012. After designing the report I tried building the solution and got the below error:

Error 1 Unable to connect to the AOS specified in the AX Client Configuration. The configuration could be missing, invalid, or the AOS is not running. To connect to the AOS, check the network connection between the client and the AOS, verify that a valid configuration exists and that the AOS service is running on the server. C:\Program Files (x86)\MSBuild\Microsoft\DynamicsTools\Microsoft.Dynamics.Framework.Design.Reporting.Modeling.targets 103 6 ReportModel2



Error 2 The "GenerateRdlTask" task failed unexpectedly.

Microsoft.Dynamics.Framework.BusinessConnector.Session.Exceptions.NoKernelSessionException: Unable to connect to the AOS specified in the AX Client Configuration. The configuration could be missing, invalid, or the AOS is not running. To connect to the AOS, check the network connection between the client and the AOS, verify that a valid configuration exists and that the AOS service is running on the server. --->


After trying the obvious things like verifying the SSRS & BC configurations and connectivity, I had to move to the boss "Google" and got out a really interesting thing about how Business Connector works:


"The root cause is the SSRS report file size is exceeding the limit, as there are multiple layouts for the report file, and each layout has several pictures embedded. So, the size was over 10M, we tried multiple times, the report can work correctly when the size is relatively small, but once over about 10M, the business connector cannot hold the report effectively and the connect is lost.


The solution is to create another SSRS file to have other layouts."


I had created a copy of the existing design which was exceeding the size so I deleted it and all worked fine.




Source: http://dynamicsuser.net/forums/t/84427.aspx

Dynamics AX client crashing/closing automatically

Today I faced a very weird issue where Dynamics Ax client was getting closed just after displaying the splash screen. I thought maybe the client is corrupt so I tried reinstalling the Ax client but it didn't work.

I even tried clearing the AUC files, restarting AOS, restarting server but all went vain. And then I noticed that a windows service named "User Access Logging Service" was in stopped state. So I restarted it and things started working perfectly.

As the service was stopped so AX wasn't able to authenticate the user trying to login.

AX2012 R3: DIXF Could not load assembly error

While working on DIXF there can be scenario where you may face errors where assemblies are not able to load properly. Like below:

"Could not load file or assembly 'microsoft.dynamics.ax.framework.tools.dmf.previewgrid.dll'"

In this case you can use 2 options:

1. You can reinstall DIXF Client.
2. You can copy the dll file mentioned in the error from one AOS where it's working properly and paste it to the AOS where the error is coming. The file location is "C:\Program Files (x86)\Microsoft Dynamics AX\60\Client\Bin".