W@rfi Blog

When the SharePoint 2007 application is upgraded to SP 2010, it creates a lot of issues related to master page and themes. First one is related to the customized master page. If you open log file, you will see the errors something like below:

10/26/2011 12:10:29.31 w3wp.exe (0x3130)                       
0x2F1C  SharePoint Foundation                
Runtime Unexpected error System.Web.HttpException: ContentPlaceHolder 'PlaceHolderHorizontalNav'
'/_catalogs/masterpage/Custom.master'، ContentPlaceHolderID
System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile,
IDictionary contentTemplateCollection)     عند System.Web.UI.Page.get_Master()     عند
System.Web.UI.Page.ApplyMasterPage()     عند System.Web.UI.Page.PerformPreInit()     عند
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
95809a17-70f7-4a61-b0ef-a6e77d9af0d2

Due to that error, you might not be able to open the lists page and site features page. These pages will show unexpected error has occured. The above exception says that some content place holders are not found in the new master page. The reason is that when the customized master page is upgraded to SP 2010, it has some missing content place holders. In order to get rid of all such errors, just add content place holder tags with the same ID’s which are not found in the new master page. You can keep the content place holders blank and can place them just as a place holder.

admin SharePoint master page, Place Holder, Sharepoint 2007, SharePoint 2010, Site Features, System Web, Theme Issues, Unexpected Error