Microsoft KB Archive/49857

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Environment Not Set When Running Paintbrush 4.00

ID: Q49857

The information in this article applies to:

  • Microsoft Paintbrush for MS-DOS, version 4.0


When running Paintbrush for the first time, you may get one of the following messages:

Unable to access Virtual Disk


Unable to init Virtual Memory

This happens when the TMP variable is set incorrectly. You need not have a TMP variable, but if you do, certain actions will take less time such as cutting and pasting. To set up a TMP variable, add the following line to your AUTOEXEC.BAT file


where the path C:\TMP points to an existing temporary directory. You can also set the environment by typing the above line at the DOS command line.

If you have set up a RAMDISK using extended or expanded memory, you can set your TMP variable to that disk. This can be done with the following two lines:


Please note the lack of spaces between the drive designator and path.

Please consult your DOS manual for information regarding setting up a RAMDISK. Additional query words:

Keywords :
Version : MS-DOS:4.0
Platform : MS-DOS
Issue type :

Last Reviewed: October 28, 1999
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