In the example output you provided, you have the sub-expression
%e^(1000*%r19).
If %r19 = 1, this cannot be computed in double float. It is about
1.97 x 10^434.
The largest double float is about 1.8 x 10 ^ 308.
Good luck.
PS
In the future, it would be good if you could provide exactly the
commands you use, so someone else could try to duplicate your problem.