Hi Dave, I have a rule based on the following that includes a test for a question mark, and it seems to work fine: alt_name~'.*[!"$%\^&*_+=\[\]{}:;@~#<>,?/|\\].*' {echotags "Road with invalid character in alt_name"; delete alt_name} So I expect you should be able to put ~’.*[?].*’ as the test if the question mark is not accepted outside the square brackets. Regards, Mike From: Dave Swarthout [mailto:daveswarthout@gmail.com] Sent: 18 March 2015 14:28 To: Development list for mkgmap Subject: [mkgmap-dev] Testing for a literal question mark How would I write a regex style rule that fires when it encounters a question mark in a name? There is a group of local mappers that have used an invented name of "Ban ?" for towns they do not know the name of. I want to set the name to something more meaningful but I can't seem to discover a way to escape the ? without crashing mkgmap. -- Dave Swarthout Homer, Alaska Chiang Mai, Thailand Travel Blog at http://dswarthout.blogspot.com