Parameter <str> in procedure <str> must be a character parameter

  Explanation:  You used the parameter as a runtime parameter for
  a filename or pathname in a DECLARE SCHEMA statement.  Such
  parameters must be declared in every procedure in the module,
  and must be character data types.  The parameter in this
  procedure is not a character data type

  User Action:  Declare the parameter as a character variable in
  the procedure.  The use of DECLARE SCHEMA is deprecated and
  should be changed to use DECLARE ALIAS and connect.