I have an issue with the datasource 0wbs_elemt_attr. While the WBS Element is in a process of creation in source system, the extractor is pulling the record with only wbs element and description into BI InfoObject. Since we have built an DSO upon this extractor and have only PSPNR (Internal WBS number) as a primary key, the data stored for this record is blank. This is resulting in records kickout in downstream applications. The next delta load will bring the same WBS element with all the attributes in it. so next time the data is sent to down stream application, there is no problem.