Hi,

I'm trying to make a grouping for a string quartet. I could use the
:orchestra ensemble-type, but I don't want the two violins to be
sub-grouped  I'm using FOMUS v0.2.28 with Common Music v2.11.3 on SBCL
v1.0.14. I've tried creating a new ensemble-type and a new instr-group,
but I keep getting an error, in what I think is check-settings-type.

Here is the error message I keep getting while "Formatting music...":

  

 debugger invoked on a SIMPLE-ERROR in thread #<THREAD "initial thread" {A72C801}>:
   unknown type specifier: +INSTR-GROUP-TREE-TYPE-AUX+
    

And here is the relevant code:

  

 (defparameter fomus-instr-groups
   (list '(:quartet
           (:group
            (:group :violin :viola :cello)))))
 
 (defparameter fomus-output
   '((:lilypond :filename "Q1.ly" :view t :process t)
     (:midi     :filename "Q1.midi")))
 
 (events (list (Q1test 20)) "Q1.fms"
   :parts *parts*
   :instr-groups fomus-instr-groups
   :ensemble-type :quartet
   :output fomus-output)
    

Any ideas here?

Thanks! -Ross

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