You cannot use the "not like" operator in Aggregates:
http://www.outsystems.com/help/servicestudio/9.1/index.htm#t=Language_Reference%2FExpressions%2FExpression_Operators.htm
You can use it within a SQL element if you must use the Not Like expression.
http://www.outsystems.com/help/servicestudio/9.1/index.htm#t=Language_Reference%2FExpressions%2FExpression_Operators.htm
You can use it within a SQL element if you must use the Not Like expression.