# Debugging

## Racc reported syntax error.

Isn't there too many "end"? grammar of racc file is changed in v0.10.

Racc does not use `%` mark, while yacc uses huge number of `%` marks..

## Racc reported "XXXX conflicts".

Try "racc -v xxxx.y". It causes producing racc's internal log file, xxxx.output.

## Generated parsers does not work correctly

Try "racc -g xxxx.y". This command let racc generate "debugging parser". Then set @yydebug=true in your parser. It produces a working log of your parser.