Regridder error: cannot reshape array of size {} into shape {}

[tmurakami7]

Specific error:
ValueError: cannot reshape array of size 67184640000 into shape (360, 720, 360, 720).

• We attempted to regrid a (360, 720) to a different (360, 720) and this was the error I got. We went inside the xESMF core.py and realized the error was on line 1052 where it did the comparison:

if self.size != reduce(operator.mul, shape, 1): raise ValueError( "cannot reshape array of size {} into shape {}".format(self.size, shape) )

• But actually the multiplication of (360, 720, 360, 720) is 67184640000 so it should not have failed in this part. We realized that shapes elements were np.int32 and so the 'reduce (mul=' was giving an overflow error.

Result:

• We fixed this by changing the shape tuple into np.int64 elements and it worked.
• This should be fixed to allow larger operation.

[huard]

Thanks for the detailed report and fix. Would you be willing to submit a Pull Request ?