DOCUMENT:Q84323 30-OCT-1999 [utilities] TITLE :PRB: Unexpected "This Program Requires Microsoft Windows" Msg PRODUCT :Microsoft Programming Utilities PROD/VER:MS-DOS:5.0x,5.1x,5.2,5.3x,5.5; OS/2:5.0x,5.1,5.11,5.13,5.15 OPER/SYS: KEYWORDS:kb16bitonly ====================================================================== ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- 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 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 ====================================================================== 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 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.