An error occurred while processing this request – WCF Data Service

In some of the operational in WCF Data Service you have hit an error message “An error occurred while processing this request”.


This error message is not useful. You have to click View Detail to view the InnerException.


In my case I need to scroll to the right to see the complete message. To me I prefer to copy the error to the clipboard and paste it to notepad.


As you can from the picture above. The message is getting closer to the error but unfortunately it does not indicate exactly which line of the code is causing the error.

In my case it is caused by AllRead instead of All. So you can change from

config.SetEntitySetAccessRule(“*”, EntitySetRights.AllRead);




config.SetEntitySetAccessRule(“*”, EntitySetRights.All);

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
This entry was posted in .Net. Bookmark the permalink.

2 Responses to An error occurred while processing this request – WCF Data Service

  1. Chathuranga says:

    nice this one help to short out my problem.very very thaks……

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.