Problem with tuplets ... please help

[eagle136]

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Hi, 
I am a noob to Lilypond and am very impressed until I tried using tuplets and 
am getting an error each time. 

The following line within the definition of a melody line context works, i.e. 
Lilypond parses it and generates .PDF and .PS files as expected: 

\times 2/3 g4 { g g g } r2 

However, I do not want g naturals I need g#s (yes within C Major ......), so I 
type the following: 

\times 2/3 g4 { gis gis gis } r2 

Lilypond reports the following error: 
---------- Capture Output ---------- 
> "U:\LilyPond\usr\bin\lilypond.exe" wart.ly 
Processing `wart.ly' 
Parsing... 
wart.ly:61:23: error: syntax error, unexpected STRING 
        g4 \times 2/3 { 
                       gis g g} r4 | 

wart.ly:93:8: error: errors found, ignoring music expression 
        
        << 

error: failed files: "wart.ly" 

> Terminated with exit code 1. 

Any ideas what the problem is ....? 

NB. The second error given above does not appear if I remove the accidental 
from the tuplet definition so there is probbaly not a problem on that line .... 

Thanks 

Simon