SAP Message RMXTAPI079 - Class &1 is not available in the trial &2

Diagnosis
In Customizing for trial types, you can specify standard classes fromClassification. You can assign a trial monitor task to eachclass.
Before executing a monitor task, the system checks whether the classesassigned to the task are assigned to the trial.
If this is not the case, the task cannot be executed.

Procedure
In the Classification view, assign the required classes to thetrial and maintain the characteristics.