Geosolve Consultant: Dr Daniel Borin
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Problem with accessing Help facilities
within WALLAP installed on a Network.

The problem
The latest version of WALLAP uses the CHM help file format which supersedes the older HLP format. The help messages are now stored in WALLAP.CHM instead of WALLAP.HLP.

When trying to use Help in WALLAP (on a network) you may see the message

           This page cannot be displayed

This is due to a recent Microsoft security patch which places restrictions on viewing CHM files that are stored on a network drive (as opposed to CHM files stored on your own computer). The Help file will appear, but instead of the topic text you will see the above error message.

The security patch and its effects are fully described on Microsoft's web site at http://support.microsoft.com/kb/896358

The cure
We plan to release a new version which deals with this problem automatically but meanwhile the following procedure is available:

The simplest solution is to be found at
http://www.fast-help.com/WebsiteHelp/index.html?CHMFilesNotDisplayingCorrectlyOnNetworks
The clever bit is this ready made utility
http://www.Fast-Help.com/download/misc/ChmFileFix.zip
which modifies the registry. You apply it to each Work Station, NOT to the Server.

Alternatively if you are confident of editing the registry you can perform the edits manually as follows:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following subkey:
      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions
     If this registry subkey does not exist, create it.
3. Right-click the ItssRestrictions subkey, point to New, and then click DWORD Value.
4. Type MaxAllowedZone, and then press Enter.
5. Right-click the MaxAllowedZone value, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Quit Registry Editor.

If this solution does not work for you, please see

http://www.drexplain.com/press/chm-files-the-page-cannot-be-displayed-error/
or
http://www.helpscribble.com/chmnetwork.html
or
http://support.microsoft.com/kb/896358