Error message "Token is reserved word" should be displayed each time that any of the list of forbidden characters and reserved words is used in order to define an object.
A full list of such characters and words can be found in 36.0.89127.2471605: Characters and reserved words forbidden for use in FireWall-1 objects definition.
However, when "." is used as a delimiter, the forbidden characters and reserved words are not recognized correctly and the error message "Token is reserved word" is not displayed.
For example: Object name 'My_object.src.local' is forbidden to be used, since 'src' is a forbidden word. Yet, the "Token is reserved word" message will not be displayed in this case as '.' was used as a delimiter in the object name.