routine "<str>" is not compatible with forward declaration

  Explanation:  A DECLARE FUNCTION or DECLARE PROCEDURE  was  used
  to  declare  a  forward  reference  for  this  routine, but this
  routine uses different parameter data types, passing mechanisms,
  number  of  parameters,  default  parameter  value,  or function
  return type.

  User Action:  Correct the CREATE statement and try again.