https://userapps.support.sap.com/sap/support/knowledge/en/3278552
3278552 - DB2: SQLCODE = -204 SAPR3.DB2QCLTRC is an undefined name | SAP Knowledge Base Article
After unicode conversion and SAP system upgrade, you get following issues: Symptom 1 Transaction code "dbacockpit" returns error: Table SAPR3.DB2QCLREQ not...