The attempted operation is prohibited because it exceeds the list view threshold enforced by the administrator
You might have developed a functionality where data is being saved in a SharePoint list. By the time you developed this functionality it was working fine.As users adds the data , some day your functionality doesn't work. That means, the data which is present in the list is not being retrieved. Don't be panic. Just open the LOG file which is present in 14 hive folder. You will come to know about this bug with the statement -"The attempted operation is prohibited because it exceeds the list view threshold enforced by the administrator". Now what you have to do is, go to central administration site. 1.Click on Manage web application 2.Select the web application on which your sitecollection is created. 3.Click on General settings and select Resource throttling 4.by default list view threshold would be 5000. your list might have data more than 5000. So , increase the number to required threshold limit. you can make it 10000, 20000 like this. Do a i