BuddyPress.org

I’m not exactly sure what you mean by “the error types and messages”. There is no place in BP where all error types and messages are defined. Instead, the content of error messages is typically defined in the function where the error might occur. The error is then sent to the user like this:
`bp_core_add_message( ‘This is where the error message goes’, ‘error’ );`
Messages added in this way, in turn, are rendered on the page after the redirect.