Happy, again

Hi folks, having set up some monadic type for usage with Happy, I've encountered some thing that puzzles me: as it seems, once happyError gets called, you cannot get back into the parser "loop" even if you return some `Failed xy::ParseMonad' instead of calling error. How and where do I catch such an error and can I really cope with most "unexpected errors" this way (even at the beginning of the input)? Thanks in advance, Frank-Andre Riess P.S.: Sorry, dear moderator, for sending this message twice. The first one was sent with an alias different to the e-mail address I've registered with (although being the same account). Me pardon.