By the end of this chapter you will be able to:

• Rollback several streams at once
• Rollback and re-do from the Console
• Rollback a single Stream Set (a run)

Rollback several Streams at once

This method of rollback is generally used when developing – in particular, when building a history over a number of runs, when you have changed the rules for building the history (so you need to start loading your data again from scratch).

• Open the model Channel Package Check
• Keeping your left mouse button pressed down, drag your cursor over all the streams in your model – it doesn't matter if you include other components
• All streams and any other components you included should now be selected
• Right-click anywhere in the model window, but not on any modelling component, to display the context menu.
• From the menu select Rollback Selected Objects
• Roll back the streams using the options:
  • Rollback all data
  • Untick Keep Old Stream Sets
• A log entry will be produced telling you what data has been cleared – in this case, all data in all selected components in the model

Rolling back (and re-running) from the Console

This method of rollback is generally used when testing – in particular, when a run was only partially successful, but you have changed the rules in the parts of the model that were successful (so you want to re-load these).

• Open the model Channel Package Check
• Run the stream Channel List Reconciliation
• Open the Console and find the log for the analysis run
• Double click on this entry
• Go to the Stream Sets tab
• You will find two buttons:
• - Rollback all data...
•  - Rollback data and run the analysis again...

Use the button Rollback data and run the analysis again... to repeat the analysis run from the previous exercise.

Rollback a single stream set (a run)

This method of rollback is commonly used when testing a large model. If a single component has been updated and you want to re-run it without causing the rest of the model to re-run, then this approach is suitable.

• Open the model Channel Package Check
• Right-click on Latest Package Update
• Select Rollback
• Accept the default options (the Keep Old Stream Sets flag is ticked)
• When the rollback has completed, look at the stream set list for this stream – you will see a single stream set (the most recent one) is yellow
• Run analysis on this stream
• The yellow (incomplete) stream set will be rebuilt – but this run will not cause any of the stream's predecessors to run