So the problem is that I am getting the negative accuracy.

====================== HTK Results Analysis =======================

  Date: Thu Feb 14 18:39:37 2019

  Ref : testref.mlf

  Rec : recout.mlf

------------------------ Overall Results --------------------------

SENT: %Correct=0.00 [H=0, S=427, N=427]

WORD: %Corr=39.58, Acc=-603.04 [H=169, D=0, S=258, I=2744, N=427]

===================================================================

Why this is coming ? and how to overcome this?

Any type of help will be appreciated.

Thanks.