MS Help Viewer applications log all status, warning and error messages to the Windows Application Event Log. This page displays the last x days of log events.
The event log is important to help developers, since this is where syntax errors will be reported.
Example: When you install a help file, HLM typically displays a message such as "The 'p' start tag on line 698 position 9 does not match the end tag body". This gives you enough information to fix the problem. The message is saying it found a <p> tag but found a </body> tag instead of a </p> tag. The <p> tag is not closed. Unfortunately HV does not report the name of the source file in error. Use mshcMigrate migrate log file to find out which HTML topic file is in error (in the log file, errors are marked with 2x asterisks **).