What does the error when trying to add a document url to content type mean?

Question

Visual Studio 2010 gives me this error,

urlOfFile - Parameter name: Specified value is not supported for the urlOfFile parameter.

by the folowing line of code.

// Specify a document template.
templateDocumentCType.DocumentTemplate = documentTemplate;

The code is taken direcly from msdn

Answer 1

Through the stacktrace I found out the error was inside Microsoft.SharePoint.SPFileCollection.get_Item(String urlOfFile). And the solution was to use an absolute url instead of only the filename for the property setter.