3604242 - Runtime error OBJECTS_OBJREF_NOT_ASSIGNED when accessing transaction SDM_MON

Category ABAP programming error
Runtime Errors OBJECTS_OBJREF_NOT_ASSIGNED
ABAP Program CL_SDM_OVERVIEW_MONITOR_LIST==CP
Application Component  BC-CCM-SDM
Date and Time  06.05.2025 15:51:02 (PST)

Short Text
Access using a 'ZERO' object reference is not possible.

What happened?
Error in the ABAP application program.
  
The current ABAP program "CL_SDM_OVERVIEW_MONITOR_LIST==CP" had to be terminated because it found a statement that could not be executed. 

Error analysis
You are trying to access a component with a 'ZERO' object reference (points to 'nothing'). Variable: " ". An object reference must point to an object (an instance of a class) before it can be used to access a component. The reference has either never been set, or it was set to 'ZERO' with a CLEAR statement.

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

SAP S/4HANA 2020
SAP S/4HANA 2021
SAP S/4HANA 2022
SAP S/4HANA 2023

SDM_PROC_STATUS,  SDM_MON, cl_sdm_int_migration_object, obj_package_migration, CL_SDM_OVERVIEW_MONITOR_LIST, R_SDM_MONITOR, FILL_OUTPUT, CL_SDM_OVERVIEW_MONITOR_LIST==CM006, SI22: GENERIC_CHECKS, R_SDM_ONLINE_EXEC, CL_SDM_UTILS, /SDF/RC_START_CHECK , KBA , BC-CCM-SDM , Silent Data Migration for SAP S/4HANA , Problem