"403 Forbidden" message
Procedures for diagnosing a 403 (Forbidden) message.

"404 Not Found" message
Procedures for diagnosing a 404 (Not Found) message.

"404 Not Found" message only when accessing topics - Microsoft PWS
Procedure to fix a 404 (Not Found) error that occurs only when you attempt to access a topic that you recently created, when the rest of the board works fine.

"404 Not Found" message when clicking a new topic
Procedure to fix a 404 (Not Found) error that occurs only when you attempt to access a topic that you recently created. The rest of the board works fine and icons show up properly

"500 Internal Server Error" message
General procedures for diagnosing a 500 (Internal Server Error) message.

"500 Internal Server Error" message accessing administration
Procedures for diagnosing a 500 (Internal Server Error) message when accessing administration (when other scripts appear to work properly).

"500 Internal Server Error" message accessing any Discus script
Procedures for diagnosing a 500 (Internal Server Error) message when accessing any Discus script.

"500 Internal Server Error" message accessing ftpdiag.cgi script
Procedures for diagnosing a 500 (Internal Server Error) message when accessing the ftpdiag.cgi script.

"500 Internal Server Error" message only occurring when posting
Procedures for diagnosing a 500 (Internal Server Error) message that occurs only when attempting to post a message.

"500 Internal Server Error" message only when creating a backup
Procedures for diagnosing a 500 (Internal Server Error) message occurring only when creating a backup with the Backup Manager.

"500 Internal Server Error" on all scripts EXCEPT diagnose.cgi
Procedures for diagnosing an Internal Server Error occurring when you access every Discus CGI script except diagnose.cgi

"Could not write main topics file" error message
Procedures for diagnosing a Discus 'Could not write main topics file' message.

"Directory creation error" message in Discus 4.0
This document is for those hosted on Windows servers who receive the 'Directory creation error' message.

"File Locking Error" message upon setting up the board
Procedures for diagnosing a Discus 'File Locking Error' message when you have just installed Discus for the first time.

"File Locking Error" message when your board has been working
Procedures for diagnosing a Discus 'File Locking Error' message that occurs suddenly, after your board has been working correctly before.

"Out of Memory" error message (possibly Internal Server Error)
Explanation of the conditions which may produce an Out of Memory error.

"Script Execution Error" when first installing
Procedures for diagnosing a Discus 'Script Execution Error' message.

"This page cannot be displayed" error message in IE
Procedures for diagnosing a 'Page cannot be displayed' error displayed by the Internet Explorer browser.

%1 is not a valid Windows NT application
Explanation of the '%1 is not a valid Windows NT application' error message encountered when attempting to access CGI scripts or the ftpdiag.cgi script.

'{Path to script}' script produced no output
Procedures for diagnosing a 'script produced no output' error.

CGIWrap Error messages
Procedures for diagnosing a CGIWrap error when attempting to access a CGI script. Various CGIWrap errors are diagnosed and discussed.

CGIWrap error when upgrading with Version Manager
Why you may get a 'CGIWrap error' when you attempt to upgrade Discus 3.01 with your Version Manager.

Clicking links within Discus brings me to the FTP setup form
What to do if clicking on links in your installed Discus board, such as administration or searching, brings you back to the FTP setup form.

Couldn't open file [board-topics.html] for [read_topic_page]!
Explanation of the error message noted in the document title, with suggestions on working around it.

Icons are displayed as broken links
Explanation of why icons do not display properly on your Discus board.

Icons do not appear and "404 Not Found" message clicking a new topic
Procedure to fix a 404 (Not Found) error that occurs when you click topics on your board. Icons on the board do not work either.

JavaScript-based 'NEW' icons appear as empty boxes
Explanation of why the 'New' icons in some Discus 4.0 skins may not display properly.

MySQL Errno: 145 (explanation and resolution)
What to do if you receive an error message from MySQL indicating error number 145.

Script Execution Error: config.*** location error
Procedures for diagnosing a Discus 'Script Execution Error' message that reports a config.*** location error.

When I access scripts, I see source code only
What to do if you see a plain text file, the first line of which is #!/usr/bin/perl (or similar), when you access ftpdiag.cgi, board-setup.cgi, or your Discus CGI scripts.