Hi I've now removed most of the ambiguities within the ANTLR4/IEEE spec: https://github.com/leviathanch/alf_parser/commit/a806a865f443c55128a9aad2d8d... It's still very very slow however (around 4 seconds) Tomorrow I'll be busy setting up the CMP machine together with Henry (who was busy today with the chemical waste) and Victor. Wish us luck. When the results turn out to be acceptable, I will put picture on Twitter :-) Cheers David