https://userapps.support.sap.com/sap/support/knowledge/en/2515806
2515806 - Message DC006 issues when you execute call transaction BP in background | SAP Knowledge...
Message DC006 issues when you execute batch job with CALL TRANSACTION BP in background to create business partner The job using CALL TRANSACTION BP is...
https://userapps.support.sap.com/sap/support/knowledge/en/3288087
3288087 - Various FI-CA transactions: error DC006 in background processing | SAP Knowledge Base...
Various FI-CA transactions like FPPCU or CORRHIST throw error message DC006 in background processing Control Framework: Fatal error - GUI cannot be reached