There appears to be an issue with "Clear Hardware Memory" for the 18X chips. I get an error using that menu item, however the "Run" functionality works correctly with a blank program.
Additional details for my findings (hippy confirms) is posted in the main forum area:
http://www.rev-ed.co.uk/picaxe/forum/topic.asp?topic_id=7222&forum_id=31
Additional details for my findings (hippy confirms) is posted in the main forum area:
http://www.rev-ed.co.uk/picaxe/forum/topic.asp?topic_id=7222&forum_id=31