I used my own dataset to train the model but got error in Dimension

I have prepared my data similar to the data used in this model with 1s time duration for each file and 16000 for sample rate and define each sound file into a folder, 

Now I am facing this error in building and training the model( InvalidArgumentError: Dimension -31998 must be >= 0
	 [[{{node zeros}}]] [Op:IteratorGetNext])

can you help me?