[Trouble shooting] (HTK) ERROR [+7332] CreateInsts: Cannot have successive Tee models

Error message : 
 ERROR [+7332]  CreateInsts: Cannot have successive Tee models

Reason :

 When you have successive silence model, this kinds of error appears.

 e.g., 'sil-sil', 'sil-sp', 'sp-sp'

Reference :

 http://www.voxforge.org/home/dev/acousticmodels/linux/create/htkjulius/tutorial/monophones/step-7/comments/errore-creating-file-for-hmm6#7_1Yg71NqpoBvxz3jb21XA