Diagnosis
No IDocs could be sent to BI using RFC.

System Response
There are IDocs in the source system ALE outbox that did not arrive inthe ALE inbox of BI.

Further analysis:
Check the TRFC log.
You can access this log using the wizard or the menu path "Environment-> Transact. RFC -> In source system".

Error handling:
If the TRFC is incorrect, check whether the source system is fullyconnected to BI. In particular, check the authorizations of thebackground user in the source system.