tablatureFormat could not work

[Yuji IMAI 今井雄治]

Dear users.

I counld not create score in LSR

Letter tablature formatting [0.07143]
http://lsr.dsi.unimi.it/LSR/Snippet?id=331

I use Lilypond version 2.13.12
Ouput following message.

Interpreting music... xxx.ly:5:17:
  In procedure ly:context-property in expression
  (ly:context-property context (quote stringTunings)):
xxx.ly:5:17: Wrong type argument in position 1
  (expecting Context): 4

Any change in ly:context-property and ly:event-property ?

Thank you for reading.

-- 
address@hidden
Yuji IMAI  今井雄治