Error in tremolo with accidentals

[Marcos da Silva Sampaio]

Hello.

I'm trying to write a tremolo that fills a 4/4 bar. I used the code
below and I got this error message:

Drawing systems...lilypond: ../flower/include/drul-array.hh:35: T&
Drul_array<T>::at(Direction) [with T = double]: Assertion `d == 1 || d
== -1' failed.

{ \repeat tremolo 16 { ees32 g } }


There is no problem if I remove accidentals:

{ \repeat tremolo 16 { e32 g } }


I use Lilypond 2.14.2.
Am I doing something wrong?

Thanks,
-- 
Marcos da Silva Sampaio

Professor de Teoria, Composição e Computação Musical
Universidade Federal da Bahia / Escola de Música

http://marcosdisilva.net
http://genosmus.com