Hi typographers!

I can't generate a Opentype PS in fontlab:

[FATAL] stack underflow
ERROR: There was a problem while compiling OpenType font. Final .otf font is not saved. Please, check OpenType features definition for errors.

OTdefinition errors are ok, I try to delete all OT features and can't do.

Any suggest?

Thanks
Jordi
www.tipografies.com