| A | |
| ArityError [LisUtils] |  ArityError ( symbol, defined_arity, used_arity )  | 
| O | |
| OptionalArgument [LisUtils] |  OptionalArgument (symbol, arg)  | 
| P | |
| ParseError [LisUtils] | ParseError (line, col, token) | 
| T | |
| TokenDefError [LisUtils] |  TokenDefError (symbol)  | 
| U | |
| Unknown_variable [Calc] | |
| V | |
| VarDefError [LisUtils] |  VarDefError ( symbol, undefined_variable )  |