Since a colleague did some maintenance on Sharepoint this week we're seeing this error when trying to display or select items from certain pages. e.g. When trying to add an image to a new website I get the error on any library I attempt to browse. I can access the library directly I just can't choose anything from it using Insert Picture.

Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.

Correlation ID:27928f33-db59-4ed7-984a-57264724effc

There seem to be many reasons that cause the error but I'm told that the correlation ID is supposed to pinpoint it. Unfortunately I get no hits on the correlation ID

Hi,

According to your post, since a colleague did some maintenances on SharePoint, you got an error when trying to display or select items from certain pages.

This issue may be caused by several factors, you can troubleshoot by the following methods,

    1.First of all, you might check your ULS log. You may find the detail information about the correlation ID, and troubleshoot with the ULS log.

    2.Checking the web part. You can try to delete some web parts in your error page, test whether it has been worked well.

    3.You web part page may be broken. You can fix it by the following steps,
          1) Opening your list view in your SharePoint Designer 2010 again.
          2) Switching the Design page to Code page.
          3) Finding the code &nbsp, and changing to  &#160.

    4.The issue may be caused by the incorrect ListName, which is a GUID id for the list's instance on a given site instance.
      You can refer to this article: http://blogs.msdn.com/b/spdsupport/archive/2008/06/06/how-to-fix-error-unable-to-display-this-web-part-on-data-views-after-restoring-site-from-backup.aspx

    5.It also may be caused by the default throttling limit set in the Business Data Catalog system. You can refer to the following two articles:
     

     http://blogs.msdn.com/b/sridhara/archive/2010/03/10/bcs-and-external-list-learning-part1.aspx

      http://sharepointroot.com/2011/02/15/bcs-external-data-unable-to-display-the-web-part/

if you have any problems, please reply me.

Thanks,
Jason Guo

Hello,

Make below changes in web.config file of your web app and see the error details:

 1. Open up your sites web.config (C:\inetpub\wwwroot\wss\VirtualDirectories\web app port\web.config), and make the standard custom errors edit. You want it to be < customerrors mode="Off"/>
   2. Then, search for the CallStack="false" and change it to CallStack="true", you should find this in the "<safemode>" node.

Let us know your error detail