use dfwin problem

[sagn]

I am trying to compile a module which calls

use dfwin

The first error states:

C:\AIDS\pdf_aids\Dev\arutil.f90(3) : Error: The module file cannot be read. Its format requires a more recent F90 compiler. [DFWIN]
use dfwin

Now this code was compiled successfully 2 years ago
(with Compaq VF version 6.1, perhaps?) We are now using version 6.6.a.

Here is the code up until the use dfwin call

BEGIN CODE
module util

use dfwin

END CODE
Any thoughts?

 

[sagn]

Oh the OS is WINDOWS XP