I read this discussion because I get an error message when executing the command:
ubuntu@ubuntu-desktop:~$ HERest -A -D -T 1 -C config -I phones0.mlf -t 250.0 150.0 1000.0 -S train.scp -H hmm0/macros -H hmm0/hmmdefs -M hmm1 monophones0
Now I get the message that the string is too long. I think that it is wrong to change the suffix. I will revert that.