Q84323: PRB: Unexpected "This Program Requires Microsoft Windows" Msg
Article: Q84323
Product(s): Microsoft Programming Utilities
Version(s): MS-DOS:5.0x,5.1x,5.2,5.3x,5.5; OS/2:5.0x,5.1,5.11,5.13,5.15
Operating System(s):
Keyword(s): kb16bitonly
Last Modified: 30-OCT-1999
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The information in this article applies to:
- Microsoft LINK for MS-DOS, versions 5.0x, 5.1x, 5.2, 5.3x, 5.5
- Microsoft LINK for OS/2, versions 5.0x, 5.1, 5.11, 5.13, 5.15
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SYMPTOMS
========
An attempt to run, in MS-DOS, an application generated by Microsoft FORTRAN
version 5.1, fails and generates the following message:
This program requires Microsoft Windows
If the application is run in Windows, the system may open an MS-DOS session,
display the message above and close the MS-DOS session, returning to Windows
without running the application.
CAUSE
=====
Most likely, one of the following errors occurred linking the application:
L2025: Multiply Defined Symbol
L2029: Unresolved External
When one of these errors occurs, Microsoft LINK sets an error bit in the
executable file header. The error bit warns the application loader that the file
contains an error. In Windows, this bit causes the loader to start an MS-DOS
session for the application. If the application is designed for Windows, the
MS-DOS correctly displays the error message above.
If an L2025 or L2029 error occurs creating an application for the MS-DOS
operating system, the loader does not reject the application. However, in the
MS-DOS operating system, running an application that has unresolved externals
may generate incorrect results or cause the system to hang. In the OS/2
operating system, the application generates a general protection (GP) fault if
it attempts to access a restricted memory location.
RESOLUTION
==========
The best method to address this situation involves resolving the LINK error at
its source. If this is not possible or undesirable, use the EXEHDR utility to
manually reset the error bit. The syntax to call the EXEHDR utility is as
follows:
EXEHDR /r <filename>
STATUS
======
Versions 3.0 and 3.1 of the Windows loader each interpret the error bit as
described above.
MORE INFORMATION
================
The following FORTRAN code reproduces the problem:
Sample Code
-----------
This is the source code for the SAMPLE.FOR file:
PROGRAM Sample_Test
PRINT *, 'FORTRAN Test'
GOTO 20
CALL MySub (123) ! MySub is unresolved at link time
20 CONTINUE
END
Project Makefile
----------------
ALL : Sample.EXE
Sample.EXE : Sample.OBJ
Link Sample.OBJ,, nul, /NOD LLIBFEW.LIB, FL.DEF
Sample.OBJ : Sample.FOR
FL /c /MW Sample.FOR
Additional query words: 5.01.20 5.01.21 5.02 5.03 5.05 5.10 5.11 5.13 5.15 5.20 5.30 5.31.009 5.50
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Keywords : kb16bitonly
Technology : kbAudDeveloper kbZNotKeyword3 kbLINKSearch kbLINK50xDOSSearch kbLINK510xDOSSearch kbLINK530xDOSSearch kbLINK50xOS2Search kbLINK520DOS kbLINK550DOS kbLINK510OS2 kbLINK511OS2 kbLINK513OS2 kbLINK515OS2
Version : MS-DOS:5.0x,5.1x,5.2,5.3x,5.5; OS/2:5.0x,5.1,5.11,5.13,5.15
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