https://userapps.support.sap.com/sap/support/knowledge/en/2595596
2595596 - Error message /KJRTAX01/B003 occurs in T-code: /KJRTAX01/B04 | SAP Knowledge Base Article
https://userapps.support.sap.com/sap/support/knowledge/en/3477466
3477466 - SUM Error: View "/KJRTAX01/B01V" is of type "C" and therefore not suitable as selection...
You are performing ABAP system update/upgrade. An error occurred in phase "MAIN_SHDRUN/ACT_UPG". In the package activation log file...