BUG: Access Violation Writing Namelist With Equivalence Member

 Last reviewed: March 28, 1996
Article ID: Q149140
The information in this article applies to:
  • Microsoft Fortran PowerStation for Windows 95 and Windows NT, version 4.0

SYMPTOMS

Attempting to perform a write of a namelist when one of the namelist variables is equivalenced causes the following application error:

Under Windows 95: 

   This program has peformed an illegal operation and will be shutdown.
   If the problem persists, contact the program vendor.

   Details:

     <program> caused an invalid page fault in module <program.exe>.
Under Windows NT version 3.51: 

   The instruction at "0x00000000" referenced memory at "0x00000000".
   The memory could not be "read".

RESOLUTION

Do not equivalence namelist 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

Sample Code to Illustrate Problem

C Compile options needed: none 

      integer i, j
      equivalence(i, j)
      namelist /list/ i
      i = 22
      write(*, list)     ! Application error caused by this line
      end

Additional reference words: 4.00
KBCategory: kbprg kbbuglist
KBSubcategory: FORTLngIss



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Last reviewed: March 28, 1996
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