Getting Error with fprintf

Why following program is displaying the value of B but not writing in a file.

How to solve this issue?

write = fopen('tempresults.dat','a');

syms T;

B = vpa(int(exp(-(65000.0)/(8.34*T)),273.15,573.15))

fprintf(write,'%e',B);

Answer 1

[Azzi Abdelmalek]

A=double(B)
fprintf(write,'%e',A);

[Pratik Sheth]

Thanks a lot!!