How can I check which rule I am in when an error occurs?

[Nupur Bhattacharyya]

I am using bison-1.28. Trying to detect which rule it is trying to
match when I get an unexpected end of file. Is there a way to 
find out? I have YYDEBUG on and YYERROR_VERBOSE on but the error
string in yyerror does not say more than parse error.

thanks
-- 
Nupur B. Andrews                 408-327-7326 
Tensilica Inc.                   address@hidden