bytea size limit?

I everyone, need help!!!
My aplication return erro:

2009-01-20 10:22:03,264 INFO  [STDOUT] Caused by: org.postgresql.util.

 TABLE batch.relatorio_gerado

  rege_id integer NOT NULL,
  fuin_id integer NOT NULL,
  rela_id integer NOT NULL,
  rege_tmultimaalteracao timestamp without time zone NOT NULL DEFAULT now(),
  rege_nnpaginas integer NOT NULL,
  rege_binario bytea,
  rege_pdf bytea

I get this erro above  refers the column "rege_pdf bytea"   , when try generate report in pdf.

thanks for help