Simple Definition Invocation Disappears

Hi all,

I was wondering why the invocation of the following definition doesn't
appear in the output:


@SysInclude {doc}

def @Sef
  left num {}
  right content
  {num @DropCapTwo content}

@Doc @Text @Begin

@Display @Heading {My Heading}

{A} @Sef {
Blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah
blah blah blah blah blah blah blah blah blah
}

@End @Text



It compiles with no errors. I am using Lout 3.39.  I have scoured the docs
and mailing list, but I suspect due to the simplicity of my problem that I
am missing something :-)

Thank you very much!

Brian