Schemas and catalogs may only be referenced with multischema
  enabled

  Explanation:  You used a statement that referred to a logical
  schema or catalog but multischema was not enabled.  This is not
  allowed.

  User Action:  Enable multischema using the SET MULTISCHEMA ON
  statement in interactive or dynamic SQL, the MULTISCHEMA option
  of the /SQLOPTION qualifier in the precompiler, or the
  /MULTISCHEMA qualifier in the module processor.