UPS Service Does Not Detect When a COM Port Is Reconnected

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Symptoms

If you have a device installed on your Windows Server 2003-based computer that converts a universal serial bus (USB) connection to a COM (serial) port connection, and that device is momentarily disconnected and then reconnected, the uninterruptible power supply (UPS) service loses its connection to the port.

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Resolution

Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

No prerequisites are required.

Restart Requirement

You must stop and then restart the Uninterruptible Power Supply service after you apply this hotfix.

Hotfix Replacement Information

This hotfix does not replace any other hotfixes.

File Information

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 32-bit Windows (X86)

   Date         Time   Version      Size     File name 
   ---------------------------------------------------- 
   08-Aug-2003  16:56  5.2.3790.75  105,984  Apcups.dll

64-bit Windows (IA64)

   Date         Time   Version      Size     File name 
   ---------------------------------------------------- 
   08-Aug-2003  16:48  5.2.3790.75  363,520  Apcups.dll

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Workaround

To work around this problem, stop and then restart the UPS service. To do this, follow these steps:

Click Start, point to All Programs, point to Administrative Tools, and then click Services.
In the Services list, right-click Uninterruptible Power Supply, and then click Stop.
In the Services list, right-click Uninterruptible Power Supply, and then click Start.
On the File menu, click Exit to close the Services dialog box.