The problem is already described 
viewtopic.php?f=1&t=997341&start=0In the generated sql Informix expects 
Code:
catalog:schema.table
  actually generated is
Code:
catalog.schema.table
which leads to syntax error.
setting:
Code:
hibernate.default_catalog=
hibernate.default_schema=
had no effect. I even removed schema and catalog from the tabe annotation, this caused a different issues : the tablename in the query looked like that 
Code:
..table
 same for seting catalog and schema to an empty string.
Versions
    * seam 2.1.2
    * Hibernate Annotations 3.3.1.GA.CP01
    * Hibernate 3.2.4.sp1.cp08
    * Hibernate EntityManager 3.3.2.GAhibernate
    * Jboss 4.3 (similar to 4.2.3)
Thanks in advance