SAP Message RSQU019 - Data still in delta queue - no init possible

Diagnosis
A delta update already exists for this DataSource in the OLTP system.There are currently data records for this update in the delta queuethat either still need to be picked up or are being reserved for arepeat of the last delta request.

System Response
It is therefore not possible, at the moment, to use enhanced selectionparameters to initialize the update.
This could lead to inconsistencies: A record might arrive in BW, and bein the delta queue, through the init. request that caused the error.It would then arrive as a duplicated data record in BW , with thenext delta request.

Procedure
First, load all the data records in the delta queue, per delta request,into BW, and intitialize again.
If this is not possible because there has not been a successfulinitialization, delete the data in the delta queue with the reportRSU20001.