= Microsoft HTML Help Error Message = == Issue == User is getting a message like this in the log: {{{ The HTML tag "..." is not a valid HTML tag (it does not begin with an alphanumeric character). }}} == Solution == This is occurring because the output directory has a character other than an alphanumeric character, for example: {{{ c:\Users\firstname.lastname\Documents\ePublisher Express Projects\Test\Output\Microsoft HTML HelpCHM\Test.chm }}} You will need to change this to a directory in the Target Settings under "Generated output location". or change the name of the directory to something that is alpha-numeric.