How To Fix /IWBEP/CM_ST015 - Association missing; Cardinality can not be determined

/IWBEP/CM_ST015 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_ST -

• Message number: 015

• Message text: Association missing; Cardinality can not be determined

Self-Explanatory Message

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/IWBEP/CM_ST015 - Details

• The SAP error message /IWBEP/CM_ST015 Association missing; Cardinality cannot be determined typically occurs in the context of SAP Gateway and OData services when there is an issue with the data model, specifically related to associations between entities.
  
  Cause:
  
  
  Missing Association: The error indicates that there is an expected association between two entities that has not been defined in the data model. This can happen if the association is not properly configured in the metadata or if the association is missing entirely.
  
  
  Cardinality Issues: The system is unable to determine the cardinality (one-to-one, one-to-many, etc.) of the relationship between the entities because the association is not defined.
  
  
  Model Inconsistencies: There may be inconsistencies in the data model, such as incorrect entity definitions or missing references.
  
  
  
  Solution:
  
  
  Define the Association: Check the data model in the SAP Gateway Service Builder (transaction code SEGW) and ensure that the necessary associations between the entities are defined. You can do this