Microsoft Dynamics AX report viewer control exception workaround

If you are facing exceptions in Event Viewer related to Microsoft Dynamics AX report viewer control like:

An unexpected exception occurred in the Microsoft Dynamics AX report viewer control. Contact your system administrator for assistance.

The type 'Microsoft.SharePoint.Portal.Analytics.UI.ReportViewerMessages, Microsoft.SharePoint.Portal, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' could not be found

OR

An unexpected exception occurred in the Microsoft Dynamics AX report viewer control. Contact your system administrator for assistance.

Object reference not set to an instance of an object.

System.NullReferenceException

   at Microsoft.Reporting.WebForms.ReportViewer.OnPreRender(EventArgs e)

Here is the simple workaround of these issues:

you have to comment out the ReportViewerMessages line in appSettings section in the report server web.config

So far, I haven’t seen any issues by commenting out this entry.