[CMS-PIPELINES] Where did my output go?

[Paul Gilmartin]

Naively, I'd expect the following:

    5 *-* 'addstream output FOO'                                               
>>>  "addstream output FOO"                                             
    7 *-* 'addpipe *.output.FOO: | stem BAR.'                                  
>>>  "addpipe *.output.FOO: | stem BAR."                                
    8 *-* 'select output FOO'                                                  
>>>  "select output FOO"                                                
    9 *-* 'output Wombat'                                                      
>>>  "output Wombat"                                                    
   10 *-* 'sever output'                                                       
>>>  "sever output"                                                     
   11 *-* say symbol( 'BAR.0' ) value( 'BAR.0' )                               
>>>  "LIT BAR.0"                                                        
LIT BAR.0        

... to do the same as:

   13 *-* 'callpipe literal Wombat | stem BAR.'                                
>>>  "callpipe literal Wombat | stem BAR."                              
   14 *-* say symbol( 'BAR.0' ) value( 'BAR.0' )                               
>>>  "VAR 1"

It doesn't.  What's the paradigm for adding to a stem piecemeal?

Thanks,
gil