Hi, I have got the following error in the HERest command to get hmm8:

.\exe\HERest -C .\config\config1 -I .\label\aligned.mlf -t 250.0 150.0 1000.0 -S train.scp -H .\hmms\hmm7/macros -H .\hmms\hmm7/hmmdefs -M .\hmms\hmm8 .\lists\monophones1

ERROR[+7321] CreatInsts: Unknown label yi

FATAL ERROR - Terminating program .\exe\HERest

However, I have searched aligned.mlf and hmm7/hmmdefs, and no "yi" was found. Even, I searched trainwords.mlf, which is used to generate aligned.mlf, and there was no "yi".

Why is that?

Sunny