Error: Content Type Still in Use

Description

When attempting to delete a content type from the site collection, Content Type Gallery, an error is returned:

Error
The content type is in use.
Troubleshoot with Microsoft SharePoint Foundation.
Correlation ID:  50b2222f-ee94-406eb7bb-d12a0be59dcd

Solution

There must be a document library, some place within the site collection using the Content Type that you are trying to delete.  For this reason it is not possible to delete the Content Type.  To fix this issue, identify the document library that is currently using the Content Type.  Change the Content Type of any documents in the library currently set to the Content Type.  Delete or remove the Content Type from the document library.

Once you've done this, it will be possible to delete the Content Type from the gallery.

Links: SharePoint 4.0 Service Pack 1

SharePoint Foundation 2010

KB 2460058: Description of SharePoint Foundation 2010 SP1
http://support.microsoft.com/kb/2460058

White paper: Service Pack 1 for SharePoint Foundation 2010
http://technet.microsoft.com/library/hh301732(office.14).aspx

SharePoint Server 2010

KB 2460045: Description of SharePoint Server 2010 SP1
http://support.microsoft.com/kb/2460045

White paper: Service Pack 1 for SharePoint Server 2010
http://technet.microsoft.com/library/hh285676(office.14).aspx


Related Links

Known issues when you install Office 2010 SP1 and SharePoint 2010 SP1
http://support.microsoft.com/kb/2532126

List of all SharePoint 2010 and Office Server 2010 SP1 packages
http://support.microsoft.com/kb/2510766

Microsoft SharePoint Server 2010 June 2011 Cumulative Update
http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=2536599

Update Center for Microsoft Office, Office Servers, and Related Products
http://technet.microsoft.com/en-us/office/ee748587.aspx

Updates for SharePoint 2010 Products
http://technet.microsoft.com/en-us/sharepoint/ff800847.aspx