Diagnosis
The system requires the source context to derive the source selection fo
r mapping rules with the Conditionor Reassignmentoperators. If the source context cannot be determined, the sourceselection result may be incorrect. The system is able to determine thesource context when the source fields for the version and time (forexample, fiscal year and posting period) are known in the system.

System Response
Error messages are issued when you try to save the method Customizingsettings or when you execute the data collection task.

Procedure
If the source is a consolidation area, you need to define mappingrules that use the source fields for version and time.
If the source is a source data basis, you need to define mappingrules that use the source fields for version or time.
When these prerequisites are met, the system is able to determine thesource fields for version or time for the source selection by invertingthe mapping rules from the target fields.
Note: The system issues an error message if the inversion of thesource fields for version or time produces ambiguous values (forexample, if mu
ltiple periods are determined for the posting period). In this case, youneed to adjust the Customizing settings for the mapping rule that usesthe version or the time as the source field.