DTP error: Lock NOT set for: Loading master data attributes
I have a custom datasource from ECC which loads into 0CUST_SALES. I'm using DTP & transformation which has worked for loading data in the past for this infoobject. The infopackage loads with a green status but when i try to load data, the DTP fails with an error message at "Updating attributes for InfoObject 0CUST_SALES Processing Terminated" & the job log says: "Lock NOT set for: Loading master data attributes". I've tried reactivating everything but it didn't help. Does anyone know what this error means? We're on SP7. Thanks in advance!