GENERAL: CHM FILES STOP WORKING IN WINDOWS XP

Information in this article applies to:

• C51 All Versions
• C166 All Versions
• C251 All Versions
• CARM All Versions

SYMPTOM

CHM (HTML Help) files downloaded from the Keil web site do not display page information. The contents are displayed in the left panel but page contents are not displayed in the right panel.

CAUSES

This problem can be caused by recent security updates to Windows XP.

RESOLUTION

To view the CHM file, try the following:

• Clear the Always ask before opening this file check box in the Open File-Security Warning dialog box that Windows XP displays when opening the CHM file.
• CHM files cannot be viewed on a shared drive. Download or copy this file to a local drive on your PC, then it will view properly.

MORE INFORMATION

• Refer to http://support.microsoft.com/kb/902225/ in the Microsoft knowledgebase.
• Refer to http://support.microsoft.com/kb/896358/ in the Microsoft knowledgebase.

Last Reviewed: Tuesday, February 27, 2007