'Action canceled' or 'The page cannot be displayed' errors displayed when opening a help file downloaded from TDT Website

Tech Note: TN0188
Product: BrainWare, SykoFizX
Version: Any Downloaded from Web
Date Added: 2005-06-22


Computers using Windows XP Service Pack 2 or Windows Server 2003 Service Pack 1 will place a block on compiled help files (*.chm) that are downloaded from the Internet. The block will interfere with the operation of the help file and an 'Action canceled' or 'The page cannot be displayed' error will be displayed in the topic pane. The problem is caused by security features introduced in the service packs designed to reduce vulnerabilities in HTML help.


After downloading the document, open it from the location where it was saved, and a security warning will appear. In order to view the help documents properly, the check mark must be cleared from the 'Always ask before opening this file' check box. The files will then open properly from the PC. Alternatively, right-click on the file you want to open, click Properties, and then click Unblock.