BUG: FOR3199 Error in Host Association of Internal Variable

• Microsoft FORTRAN PowerStation for Windows 95 and Windows NT, version 4.0

SYMPTOMS

When you use a host program unit variable name in an internal procedure's statement function expression, the compiler erroneously issues the following error:

   error FOR3199: invalid redeclaration of host symbol <name>

RESOLUTION

Explicitly declare your internal procedure statement function variables.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

In the following sample code, the variable x is declared after the statement function that uses it. Reversing the declarations corrects the problem. That is, explicitly declaring your internal procedure variables before using them in a statement function works around the problem.

Sample Code to Illustrate Problem and Workaround

! Compile options needed: none

      program test
          integer x
      contains
          subroutine a()
          real b, c

          b(x) = real(x)
          integer x

!          b(x) = real(x)
          c = b(x)
          end subroutine
      end