hitchuta - 2008-05-22

I'm trying to use ray tracing function in Pixie , but it's seems do not work with my version.
I 'm using Liquid to generate Rib File but when rendering I have this message :
Parameter "trace" is not declared.
I 'have also test with TEST_environment.rib found in wiki example section, but I have the same message.

My Version is Build From svn Trunk version at revision 1161 on suse Linux(X86-64)
Does anyone know what can cause this.