Thursday, September 04, 2008
SharePoint says "Unknown Error"
ERROR: Only Content controls are allowed directly in a content page that contains Content controls.
By default, SharePoint doesn't seem willing to share some of its internal errors with developers opting instead to use a generic "Unknown Error" page. The informative (and I use the term loosely) error string above wasn't displayed in the browser until the file C:\Inetpub\wwwroot\wss\VirtualDirectories\80\web.config was modified to disable custom error messages.
By changing <SafeMode CallStack="false" ...> to <SafeMode CallStack="true" ...> and changing <customErrors mode="On" /> to <customErrors mode="Off" />, the generic error page is replaced with a more detailed error message and maybe even a callstack.
As for the error above? It was caused by a comment that had been added to an .aspx file. For some reasons, comments were not allowed because they didn't qualify as "content controls".
By default, SharePoint doesn't seem willing to share some of its internal errors with developers opting instead to use a generic "Unknown Error" page. The informative (and I use the term loosely) error string above wasn't displayed in the browser until the file C:\Inetpub\wwwroot\wss\VirtualDirectories\80\web.config was modified to disable custom error messages.
By changing <SafeMode CallStack="false" ...> to <SafeMode CallStack="true" ...> and changing <customErrors mode="On" /> to <customErrors mode="Off" />, the generic error page is replaced with a more detailed error message and maybe even a callstack.
As for the error above? It was caused by a comment that had been added to an .aspx file. For some reasons, comments were not allowed because they didn't qualify as "content controls".
