Dear Heiga
i made for label file (full) p1^p2-p3+p4=p5 only
i made the mono label file too
i recorded 60 utterance raw file
i run the demo
the same error appeared to me
system is PLAIN
ERROR [+2121] HInit : Too Few Observation Sequences [0]
HInit -A -C trn.cnf D -T 1 -S train.scp -m 1 -u tmvw -w 3 -H init.mmf ...... -l aa -o aa state-5_mcp-75_lf0-3.prt
this was happened also when i worked on 50 utterance i added 20 additional and the same error appear to me for the phoneme aa
can this error belong to something else that it is a few training data for the phoneme aa
(can be for example that i included for full label format the p1^p2-p3+p4=p5 only
plz help
thanks