[Pw_forum] error with open64 compilers

[Arturo]

Hi,

I'm trying to compile espresso with open64 compiler and I get this error:

mpif90 -O3 -ftpp -D__FFTW -D__MPI -D__PARA -I../include -I../../iotk/src 
-I../../Modules -I../../PW/src -I. -c elf.f90

   real(dp), parameter :: fac = (1.d0/2.d0) * 1.d0/(3.d0*pi**2)**(1.d0/3.d0)
                                                                      ^
openf95-206 openf90: ERROR DO_RDG, File = elf.f90, Line = 203, Column = 70
   The exponent in a constant initialization expression must be type 
integer.

How can I solve it?

Thanks!!
Arturo