partcombine and tag

[Gianmaria Lari]

I'm trying to understand how to use partcombine and tag and I don't understand why compiling the following code I obtain two measures

4 4 | 4 

instead of just one 

4 4 4

In the attached image the resulting score.

Here it is the code.

%%%

\version "2.19.40"

note = \partcombine {e'4} {\tag #'pdfOut c4 \tag #'midiOut c'4}

music = 

{

  \time 3/4 

  \note \note \note

}

\score 

{

  \keepWithTag #'pdfOut \music

  \layout {}

} 

Thanks, g.

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