| Kind                | When signaled  |
|-
| (exn arity)         | Signaled when a procedure is called with the wrong number of arguments.       |
| (exn type)          | Signaled on type-mismatch errors.                                             |
| (exn arithmetic)    | Signaled on arithmetic errors, like division by zero.                         |
| (exn i/o)           | Signaled on input/output errors.                                              |
| (exn i/o file)      | Signaled on file-related errors.                                              |
| (exn i/o net)       | Signaled on network errors.                                                   |
| (exn bounds)        | Signaled on errors caused by accessing non-existent elements of a collection. |
| (exn runtime)       | Signaled on low-level runtime-system error-situations.                        |
| (exn runtime limit) | Signaled when an internal limit is exceeded (like running out of memory).     |
| (exn match)         | Signaled on errors raised by failed matches (see [[#match|match section]]).   |
| (exn syntax)        | Signaled on syntax errors.                                                    |