The analysis facility can generate many messages, warnings, and errors. The messages are self-explanatory. The warnings generally tend to be self-explanatory, but there are some warnings that have to do with the program logic which are obscure. Likewise, errors that relate to bad sets of user commands will give understandable messages; internal logic errors give incomprehensible messages. If you get an error message you do not understand, please see Bob Bruccoleri or mail to `firstname.lastname@example.org'. Chances are that you have found a bug, and I should always be told about that.