WebX Client Freezing During Navigation

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When using some older versions of Microsoft Internet Explorer, Internet Explorer freezes after viewing 2-3 mimics or graphs when navigating through the database. This problem was caused an underlying method that controls the links between Internet Explorer and the ClearSCADA web server not being handled correctly by Internet Explorer.

Microsoft has patched and fixed this bug in Internet Explorer with the release of XP Service Pack 2.

The recommended way to correct this problem is to update Internet Explorer with the latest security fixes as downloaded from the Microsoft web site.

In situations where appropriate patches may not be installed, a workaround has been provided in ClearSCADA to handle web client links in a way which bypasses this error.

To enable this workaround mode in ClearSCADA:

• Open the registry editor by running "regedit".

• Browse to the key

HKEY_LOCAL_MACHINE\SOFTWARE\Serck Controls\SCX6\ViewXCtrl

• If a value named CloseConnection does not exist, create a String Value of the same name.

• Set its value to "True"

After the change, restart Internet Explorer and the problem should be resolved.

WARNING: Incorrectly modifying the registry keys may cause serious consequences. Proceed at your own risk.

Fixed in Version: This problem was first corrected in Microsoft Windows XP Service Pack 2.
Standalone patches are also available for

• Internet Explorer 6 Service Pack 1

• Internet Explorer 6 Service Pack 1 (64-Bit Edition)

• Internet Explorer 6 for Windows Server 2003

• Internet Explorer 6 for Windows Server 2003 (64-Bit Edition)

• Internet Explorer 6

• Internet Explorer 5.5 Service Pack 2

• Internet Explorer 5.01 Service Pack 4

• Internet Explorer 5.01 Service Pack 3

For further information see: http://support.microsoft.com/kb/832894

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