Microsoft KB Archive/149154

= BUG: Memory Leak Caused by Formatted Internal WRITE =

PSS ID Number: 149154

Article Last Modified on 11/2/1999

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The information in this article applies to:


 * Microsoft Fortran PowerStation for Windows 95 and Windows NT 4.0

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This article was previously published under Q149154



SYMPTOMS
Performing a formatted internal WRITE causes a memory leak. A memory leak is caused by a program not releasing the memory it allocates.



RESOLUTION
Use list-directed I/O with an internal WRITE.



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 memory storage area associated with the character string "LLINE" is not released after each internal WRITE. Consequently, additional memory must be allocated for each subsequent internal WRITE utimately causing all physical and virtual memory to be exhausted.

Sample Code to Illustrate Problem and Workaround
! Compile options needed: none

PROGRAM TEST INTEGER I     CHARACTER LLINE*32 DO I=1,1000000 WRITE(LLINE, '(I10,E20.5)') I, REAL(I) ! Memory leak here !         WRITE(LLINE, *) I, REAL(I) ! Uncomment this line for workaround END DO     END

Additional query words: 4.00

Keywords: kbLangFortran KB149154

Technology: kbAudDeveloper kbFORTRANPower400NT kbFortranSearch kbZNotKeyword8

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