Gregorian clefs

[Joseph Folens]

Dear reader,
 
I try to add the command \clef vaticana-do1 (or 2 or 3) into a text for a score
In the report there is always a reference like "vaticana-do" is invalid, followed y
the valid clefs, wich include the clef I have in my text. So, it seems the programm
does not recognize its own clefs, or is there something I missed?
 
Many thanks for your time.
 
Folens Joseph

Gregotest.ly
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