Dear Nicolas and all, The org-export provides a quitting option for user by typing `q`. This is nice feature but it is implemented with an error function. For me, it is not actually an error, it is one of the user actions, and when `debug-on-error` is `t`, the Backtrace buffer will be popped up every time. It is annoying. Please find a patch to replace error function with a simple message. What do you think? Best regards, Takaaki -- Takaaki ISHIKAWA