Microsoft KB Archive/87982

= PRB: Opening Scratch File with Units 0, 5, or 6 Causes F6202 =

Article ID: 87982

Article Last Modified on 12/1/2003

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APPLIES TO


 * Microsoft FORTRAN Compiler 4.0
 * Microsoft FORTRAN Compiler 4.01
 * Microsoft FORTRAN Compiler 4.1
 * Microsoft FORTRAN Compiler 5.0
 * Microsoft FORTRAN Compiler 5.1
 * Microsoft FORTRAN Compiler 4.1
 * Microsoft FORTRAN Compiler 5.0
 * Microsoft FORTRAN Compiler 5.1
 * Microsoft FORTRAN PowerStation 1.0 Standard Edition
 * Microsoft Fortran PowerStation 1.0a for MS-DOS
 * Microsoft FORTRAN PowerStation 32
 * Microsoft FORTRAN PowerStation 32

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This article was previously published under Q87982



SYMPTOMS
Programs that open an unformatted scratch file with the unit number 0, 5, or 6 may cause the following error:

run-time error F6202: OPEN(CON)

-terminal I/O not consistent with OPEN options



CAUSE
The unit numbers 0, 5, and 6 for the open statement have been pre-assigned to do formatted I/0 on keyboard and screen. Opening unformatted scratch files with these unit numbers causes the runtime to attempt to open the keyboard or screen for unformatted I/O, which generates the above error. This is expected and correct behavior.



RESOLUTION
To avoid this error, open the scratch file with any number other than 0, 5, and 6.



Sample Code #1
The following code generates the error: open(6, form='unformatted') end

Sample Code #2
The following code illustrates a correct usage of the open statement for creating an unformatted scratch file: open(3, form='unformatted') end

Additional query words: 4.00 4.10 5.00 5.10 1.00

Keywords: kberrmsg kblangfortran KB87982

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