I'm using SharePoint Designer 2010. I edit mypage.aspx and change the first line from MasterPageFile="~masterurl/default.master" to MasterPageFile="~masterurl/minimal.master" to use a different master page for the page.
When I save changes and then visit the page, I get:
Error The file or folder name contains characters that are not permitted. Please use a different name. Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: 0f774212-4f09-45f0-bc06-59406f2db725 Date and Time: 06/02/2013 15:38:52
What am I doing wrong?