I'm get the following error when trying to create hmm6. Which file do I have to fix?

-bash-4.1$ HERest -A -D -T 1 -C config  -I phones1.mlf -t 250.0 150.0 3000.0 -S train.scp -H hmm5/macros -H  hmm5/hmmdefs -M hmm6 monophones1
HERest -A -D -T 1 -C config -I phones1.mlf -t 250.0 150.0 3000.0 -S train.scp -H hmm5/macros -H hmm5/hmmdefs -M hmm6 monophones1

HTK Configuration Parameters[10]
  Module/Tool     Parameter                  Value
#                 NUMCEPS                       12
#                 CEPLIFTER                     22
#                 NUMCHANS                      26
#                 PREEMCOEF               0.970000
#                 USEHAMMING                  TRUE
#                 WINDOWSIZE         250000.000000
#                 SAVEWITHCRC                 TRUE
#                 SAVECOMPRESSED              TRUE
#                 TARGETRATE         100000.000000
#                 TARGETKIND          MFCC_0_D_N_Z

HERest  ML Updating: Transitions Means Variances

 System is SHARED
44 Logical/44 Physical Models Loaded, VecSize=25
2 MMF input files
Pruning-On[250.0 150.0 3000.0]
 Processing Data: sample1.mfc; Label sample1.lab
  ERROR [+7321]  CreateInsts: Unknown label DIAL
 FATAL ERROR - Terminating program HERest