RuntimeError: Expected object of type torch.FloatTensor but found type torch.DoubleTensor for argument #3 'other'

[jihaonew]

The error occurs in functions/LBFGS.py, line 854.
I think this error comes from t. It becomes a double precision number with the process of convergence.
I tried

if(F_new > F_k + (c1*t*gtd).float()):

or

if(F_new.double() > F_k.double() + (c1*t*gtd)):

However, if I do so, the loss will not decrease any more.

[hjmshi]

Thanks! Let me look into it. Is this with a particular network or problem that you are looking at?

[jihaonew]

I working on a non-linear least squares problem with highly-dense Jacobian.