Device Error Upgrading WFWG Over Windows with CO/Session (91198)

The information in this article applies to:

Microsoft Windows for Workgroups 3.1

This article was previously published under Q91198

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

Edit the SYSTEM.INI file with any text editor.
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$CS.386
To enable the default Windows for Workgroups driver, insert a semicolon (;) at the beginning of the DEVICE=CS$VCD.386 line, as follows:
```
      ;DEVICE=CS$VCD.386
						
```
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.

Modification Type:	Major	Last Reviewed:	11/5/1999
Keywords:	KB91198 kbAudDeveloper