How To Fix CRMS4_PS_NET031 - The successor NCD for NCD &1 is not unique (internal error)

SAP Error Message - Details

• Message type: E = Error

• Message class: CRMS4_PS_NET - Net Calculation

• Message number: 031

• Message text: The successor NCD for NCD &1 is not unique (internal error)

What causes this issue?

Net calculation failed to determine the sucessor net calculation
document, because more than one net calculation header has been
determined.

System Response

Net calculation processing is not carried for the current net
calculation unit period.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

There should be only one net calculation document header (table
<NP>CRMD_PS_NCD</>) for each settlement period, with either of the
following statuses:
"Open" (technical key <NP>01</>)
"Billed" (technical key <NP>02</>)
The problem occured for net calculation document &V1&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CRMS4_PS_NET031 - The successor NCD for NCD &1 is not unique (internal error) ?

  The SAP error message CRMS4_PS_NET031 indicates that there is an issue with the successor Non-Conformance Document (NCD) in the system. Specifically, it suggests that the system has encountered a situation where the successor NCD for a given NCD is not unique, which is considered an internal error.
  Cause:
  
  Data Integrity Issues: The error often arises due to data integrity problems in the database, where multiple successor NCDs are linked to the same predecessor NCD, leading to ambiguity.
  Configuration Errors: Incorrect configuration settings in the SAP system related to NCD management can also lead to this error.
  Custom Development: If there are custom developments or enhancements in the NCD processing logic, they might inadvertently create situations where multiple successors are defined for a single predecessor.
  
  Solution:
  
  Check NCD Relationships: Review the relationships between NCDs in the system. Ensure that each NCD has a unique successor. You can do this by querying the database or using transaction codes related to NCD management.
  Data Cleanup: If you find duplicate successor entries, you may need to clean up the data. This could involve deleting or modifying the duplicate entries to ensure that each predecessor has a single, unique successor.
  Review Configuration: Check the configuration settings related to NCDs in your SAP system. Ensure that they are set up correctly and that there are no conflicting settings.
  Consult Documentation: Refer to SAP documentation or notes related to NCD management for any known issues or patches that might address this error.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They may provide specific guidance or patches to resolve the internal error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CRMD_ORDER, CRMD_ORDERADM_H, or others that pertain to NCD management.
  SAP Notes: Search for SAP Notes related to CRMS4_PS_NET031 in the SAP Support Portal. There may be specific notes addressing this error or providing additional troubleshooting steps.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that the NCD relationships are functioning as expected.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.