| Invalid UTF-16 (dangling high surrogate at end of file) | exception | critical | antlr, char-stream, utf-16, truncation, surrogate |
| Invalid tokens or characters at index "+pos+" in path… | exception | error | antlr, xpath, syntax, java |
| at index isn't a valid rule name | exception | error | antlr, csharp, xpath, parser-rules, code-generation |
| Missing path element at end of path | exception | error | antlr, csharp, xpath, input-validation |
| output directory ` ` is not a directory | validation | error | antlr, go, statistics, filesystem |
| A parser interpreter can only be created for a parser or… | exception | error | antlr, grammar, interpreter, java |
| This method is not implemented for readonly sets. | exception | warning | antlr, java, atn, atn-config-set, readonly, contains |
| Missing element after | exception | error | antlr, python, xpath, validation |
| This set is readonly | exception | error | antlr, java, atn, atn-config-set, readonly, dfa |
| Rule dependency version mismatch | validation | error | |
| ANTLR installation corrupted; can't load messages format… | console | error | |
| ANTLR installation corrupted; ANTLR messages format file +… | console | error | |
| Unknown token "+tagChunk.getTag()+" in pattern: "+pattern | validation | error | |
| invalid tag: "+tagChunk.getTag()+" in pattern: "+pattern | exception | error | |
| Unknown rule "+tagChunk.getTag()+" in pattern: "+pattern | validation | error | |
| tag delimiters out of order in pattern: "+pattern | exception | error | |
| missing start tag in pattern: "+pattern | exception | error | |
| unterminated tag in pattern: "+pattern | exception | error | |
| set is empty | exception | error | |
| fromIndex | validation | error | |
| index | validation | error | |
| nbits | validation | error | |
| set | validation | error | |