#one output before error:
tensor([[  4.0024, -22.5107,   8.6548, -26.3529, 199.5710, -23.9216, -40.0046,
3.1537, -19.8343, -39.2633,  34.4721,  -7.2311, -56.9415,  -5.0400,
15.7165]])
#where the error occur:
tensor([[nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan]])