One of the cool things with PowerPivot is to click on an SharePoint List’s Export as Data Feed (i.e. an Atom feed) and its data can be imported directly into a PowerPivot for Excel workbook. To get this thing to work, one of the key things that I remind people regularly is to make sure you install ADO.NET Data Services Update for .NET Framework 3.5 SP1.
- ADO.NET Data Services Update for .NET Framework 3.5 SP1 for Windows 2000, Windows Server 2003, Windows XP, Windows Vista and Windows Server 2008
- ADO.NET Data Services Update for .NET Framework 3.5 SP1 for Windows 7 and Windows Server 2008 R2
So after doing this multiple times, I proceeded to do my usual atom feed import like I usually do:
Repro the issue
1) Go to my SharePoint List and click on Export as Data Feed
2) When requested to do a File Download of the List.atomsvc file, click Open
3) Because you installed PowerPivot on your box, it will give you the option to import this Atom feed into an existing (e.g. Book1) or new workbook. Choose appropriately and click OK.
4) It’ll provide you the Table Import Wizard so you can import your feed
5) Everything works like usual in terms of a PowerPivot data import
![clip_image001[5]](https://dennyglee.files.wordpress.com/2010/08/clip_image0015.jpg "clip_image001[5]")
.
What did I expect?
6) But instead of the nice message indicating that you had imported data properly:
so it shows up nicely in your PowerPivot workbook
.
What did I actually get?
7) you get this strange error message:
![clip_image001[7]](https://dennyglee.files.wordpress.com/2010/08/clip_image0017.jpg "clip_image001[7]")
in text this is:
For security reasons DTD is prohibited in this XML document. To enable DTD processing set the ProhibitDtd property on XmlReaderSettings to false and pass the settings into XmlReader.Create method.
So how do I FIX this?
Thanks to John McConnell for reminding me that sometimes the solution is to do something simple (for context, I just had published the PowerPivot Security Architecture so my brain is still fried).
So the solution is to simply re-install ADO.NET Data Services Update for .NET Framework 3.5 SP1 again. Yup, rather long bit of writing to simply say – install it again!
But there you have it 
Denny Lee 
[…] Please click through to continue reading Help, my PowerPivot for SharePoint Lists Atom Feed has fallen and it can’t get up! […]
Hello! I have re-installed ADO.NET services from new source(KB976127, 27/1/11, ver.3.5) and old(KB982307, 5/7/2010, ver.3.5), but get this message! Are you mean the re-installation as to uninstall hotfix and install again?
Hey Dimon,
you shouldn’t need to uninstall the hotfix and re-install, a simple re-install should do the trick. If you’re still running into issues, I would suggest checking the PowerPivot for SharePoint forums so its possible to get some of the PFE or CSS folks involved.
HTH!
Denny
Hello! We’ve got the same problem as Dimon. We installed KB976127 and old KB982307 on the server but the DTD security error stays…
I can get a successful test connection from within the import table wizard in Excel
@dennyglee when those hotfixes are installed on the server you cannot re-install them… windows says that they are already installed and exit the installer. Only way is to uninstall them and install again.
maybe someone has an solution for this because it’s very frustating…
Sorry that you guys are continuing to run into this – I would suggest that you hit the PowerPivot for SharePoint newsgroups for this as if you’re running into the continual problems of uninstall/install then ther may be someother issues going on. Sorry that I could not be of more help on this one.
I am having the same issues. I have installed the hotfix, uninstalled, reinstalled, and installed the old hotfix and I am still receiving this error when I try to open a list for an atom feed….
Sorry that you’re still running into issues about the oData feed. At this point, I would suggest hitting the PowerPivot for SharePoint or SharePoint Newsgroups and provide details about your error. Best of luck!
I got this working finally. Here is a link to the thread from technet regarding what I had to do.
http://social.msdn.microsoft.com/Forums/en/sqlkjpowerpointforsharepoint/thread/ee506212-6d65-462d-93e6-59b6f4f416c2
Excellent! Glad that it worked out!