Hi Christina, there is only a very big java stack trace saying the sql statement is wrong. The statement SELECT id,name FROM metadata WHERE $X{IN, id, List} is expanded to: SELECT id,name FROM metadata WHERE id IN([1,2]) And the stack trace in the sql classes say something like: "[" error in sql statement. The Collection List is filled from another sql statement with id from type Integer. Therefore an "Input Datatype" was defined. When printing the parameter in the main report we get something like [1,2,3,4]. When we change the sql query manually to SELECT id,name FROM metadata WHERE id IN(1,2) everything is working fine. Regards Ingrid