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About Exceptions
Exceptions apply to trips that operate under special conditions.
About Blocking with Exceptions
If you use exceptions, make sure that you have identified the trips with exceptions before blocking. Creating blocks with trips with exceptions involves blocking the base exception trips first and then blocking the trips with other exceptions using the Blocking tool.
Blocking Base Exceptions
The exception combination that contains the most platform time should be used in the blocking process so that as many trips as possible are blocked as the system performs its first attempt at blocking the trips (in automatic blocking).

Blocking Base Exceptions

The exception combination that contains the most platform time should be used in the blocking process so that as many trips as possible are blocked as the system performs its first attempt at blocking the trips (in automatic blocking).

The exception combination that contains the most platform time is usually considered the base exception.

In the Blocking screen, click Blocking > View Options > Exceptions.
The Exc column appears to the right of the Frz (Freeze) column.
Press F3.
The Set Mode dialog appears.
Select the appropriate exception combination as the base exception.
Click OK.
The trips with exceptions that are compatible with the selected exception combination in your current context appear in the Unblocked grids.
Proceed with blocking the trips according to your normal practice.
Assign the garage and division to the completed blocks.