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Q91198: Device Error Upgrading WFWG Over Windows with CO/Session

Article: Q91198
Product(s): Microsoft Windows 3.x Retail Product
Version(s): WINDOWS:3.1
Operating System(s): 
Keyword(s): 
Last Modified: 05-NOV-1999

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The information in this article applies to:

- Microsoft Windows for Workgroups version 3.1 
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SYMPTOMS
========

After upgrading to Windows for Workgroups (WFWG) from Windows version 3.0 or 3.1
with version 6.x of CO/Session installed, the following error message occurs
when you try to run Windows for Workgroups in enhanced mode:

  A device has been specified more than once in the SYSTEM.INI file or a device
  specified in SYSTEM.INI conflicts with a device which is being loaded by an
  MS-DOS device driver or application. Remove the duplicate entry from the
  SYSTEM.INI file and restart Windows.

CAUSE
=====

Both CO/Session and Windows for Workgroups install a virtual communications
driver (VxD). When Windows for Workgroups upgrades, it places a second VxD in
the [386Enh] section of the SYSTEM.INI file. Even though these drivers have
different filenames, Windows for Workgroups sees them as duplicates because they
are both virtual communications drivers.

CO/Session originally adds:

      DEVICE=CS$VCD.386

Windows for Workgroups upgrade then adds:

      DEVICE=VCD.386

WORKAROUND
==========

1. Edit the SYSTEM.INI file with any text editor.

2. Locate the [386Enh] section and find lines similar to the following:

        DEVICE=CS$VCD.386
        DEVICE=VCD.386

  NOTE: The line may read DEVICE=VCD$CS.386

3. To enable the default Windows for Workgroups driver, insert a semicolon (;)
  at the beginning of the DEVICE=CS$VCD.386 line, as follows:

        ;DEVICE=CS$VCD.386

4. To enable the CO/Session driver, insert a semicolon (;) at the beginning of
  the DEVICE=VCD.386 line:

        ;DEVICE=VCD.386


MORE INFORMATION
================

For additional information concerning functionality of CO/Session and Windows
for Workgroups, contact Triton Technologies, Inc.

CO/Session is manufactured by Triton Technologies, a vendor independent of
Microsoft; we make no warranty, implied or otherwise, regarding this product's
performance or reliability.

Additional query words: 3.10 3.1

======================================================================
Keywords          :  
Technology        : kbAudDeveloper kbWFWSearch kbWFW310
Version           : WINDOWS:3.1

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