| A | |
| Already_set [Set_once] | |
| B | |
| Bad [Arg] | |
| Break [Sys] | 
Exception raised on interactive interrupt if  Sys.catch_breakis on. | 
| Bug [Common] | |
| D | |
| Duplicate_found [List] | |
| E | |
| Empty [Heap] | 
Raised when  toporpopis called on an empty heap. | 
| Empty [Fqueue] | |
| Empty [Stack] | |
| F | |
| Finally [Exn] | 
Raised when finalization after an exception failed, too.
 | 
| Finally [Common] | 
Raised when finalization after an exception failed, too.
 | 
| H | |
| Help [Arg] | |
| I | |
| IOError [Bigstring] | 
Type of I/O errors
 | 
| Invalid_file_format [Zone] | |
| R | |
| Reraised [Exn] | |
| U | |
| Unimplemented [Common] | |
| Unix_error [Unix] | 
Raised by the system calls below when an error is encountered.
 | 
| Unknown_zone [Zone] |