Script
You can use the script step to perform any modification of incoming
message content or headers.
How to create a script see Creating scripts.
A data flow cannot be activated if it uses a script that has no approved version available. Activated data flows use the latest approved version available of the script. When the script is updated with a new approved version, the data flows do not require re-activation. They start using the newly approved version of the script when their last run with the older version completes.
When the script input or output parameters are changed after modeling in data flow. All changes are reflected also in the Script activity and must be corrected appropriately.