WFWG System Hangs After Running Central Point Backup

 Last reviewed: November 23, 1994
Article ID: Q90238
The information in this article applies to:
  • Microsoft Windows for Workgroups version 3.1

SYMPTOMS

Your machine may stop responding (hang) after running Central Point version 7.1 Backup.

CAUSE

The virtual direct memory addressing (DMA) driver may not be configured properly or you may be using the driver supplied with Microsoft Windows version 3.1. With Windows for Workgroups and Central Point Backup, the Windows 3.1 virtual DMA driver should not be used.

WORKAROUND

If you are using the Windows 3.1 driver, replace it with the one supplied with Windows for Workgroups version 3.1. Install the file VDMAD.386 in the SYSTEM.INI file in the [386Enh] section. It should look like this: 

   device=vdmad.386
Another possible solution is to increase the DMABufferSize= line in the SYSTEM.INI file in the [386Enh] section to 17 or more. For example: 

   DMABufferSize=17

MORE INFORMATION

When Central Point's PC Tools installs, it checks to see if the Windows 3.1 is installed. If it is, PC Tools does not install its version of the virtual DMA driver. If PC Tools detects another virtual DMA driver installed already (VDMAD.386), it replaces it with the default virtual DMA driver (*VDMAD). Since Windows for Workgroups replaces *VDMAD, PC Tools incorrectly returns the system to the old setting.

KBCategory: kb3rdparty kbprb
KBSubcategory: wfw wfwg
Additional reference words: 3.10 3rdparty

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Last reviewed: November 23, 1994
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