TSA6OO-X-268: A data set is already open. You cannot open a data set or alter a scan when a data set is open.

TSA6OO-X-268: A data set is already open. You cannot open a data set or alter a scan when a data set is open.

Source: TSA6OO.NLM

Explanation: The specified file is already open and cannot be accessed now.

Action: Make sure the specified file is not in use by any application. If it is, close the application.