How To Fix DMC_GENERAL034 - Split cardinality changed; Rule assignments are initialised

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 034

• Message text: Split cardinality changed; Rule assignments are initialised

What causes this issue?

The split cardinality of a structure has been changed. The rulecalls of
all fields marked as 'split relevant' are being reset.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL034 - Split cardinality changed; Rule assignments are initialised ?

  The SAP error message DMC_GENERAL034 indicates that there has been a change in the cardinality of a split in a data flow, which has led to the reinitialization of rule assignments. This typically occurs in the context of SAP Data Management and Data Integration processes, particularly when working with SAP Data Intelligence or SAP Data Hub.
  Cause:
  
  Change in Data Model: The cardinality of a split may have changed due to modifications in the underlying data model or schema. For example, if a source data structure was altered to allow for more or fewer records, this could trigger the error.
  Configuration Changes: Changes in the configuration of the data flow or the rules associated with the split can also lead to this error. If the rules are not compatible with the new cardinality, they may need to be re-evaluated.
  Data Source Changes: If the data source itself has been modified (e.g., new fields added, fields removed, or data types changed), this can affect how the data is split and processed.
  
  Solution:
  
  Review Data Model Changes: Check if there have been any recent changes to the data model or schema that could have affected the cardinality. If so, ensure that the data flow is updated accordingly.
  Reconfigure Rule Assignments: After a cardinality change, you may need to reconfigure the rule assignments in the data flow. This involves reviewing the rules and ensuring they are compatible with the new cardinality.
  Validate Data Flow: Validate the entire data flow to ensure that all components are functioning correctly and that there are no other errors present.
  Test the Data Flow: After making the necessary adjustments, test the data flow to ensure that it processes data as expected without triggering the error.
  Consult Documentation: Refer to SAP documentation or support resources for specific guidance related to your version of SAP Data Management tools.
  
  Related Information:
  
  SAP Data Intelligence: This is a comprehensive data management solution that allows for the integration, orchestration, and management of data across various sources.
  Cardinality in Data Modeling: Cardinality refers to the uniqueness of data values contained in a particular column (attribute) of a database table. Understanding cardinality is crucial for effective data modeling and integration.
  Error Handling in SAP: Familiarize yourself with SAP's error handling mechanisms to better understand how to troubleshoot and resolve issues in data flows.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance, as they can provide more tailored guidance based on your specific environment and configuration.