How To Fix MODEL089 - Cardinality of attribute '&2' of instantiated IO class '&1' changed

MODEL089 - Overview

• Message type: E = Error

• Message class: MODEL - Modeling

• Message number: 089

• Message text: Cardinality of attribute '&2' of instantiated IO class '&1' changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MODEL089 - Cardinality of attribute '&2' of instantiated IO class '&1' changed ?

  The SAP error message MODEL089 indicates that there is a mismatch in the cardinality of an attribute in an instantiated IO (Input/Output) class. This typically occurs in the context of SAP's Business Object Processing Framework (BOPF) or similar modeling environments where data models are defined.
  
  Cause:
  The error arises when the cardinality of an attribute (e.g., a field or property) in a data model has been changed after the IO class has already been instantiated. Cardinality refers to the number of instances of one entity that can or must be associated with instances of another entity. For example, if an attribute was originally defined to allow multiple values (1:n) and has been changed to a single value (1:1), this inconsistency can trigger the error.
  
  Solution:
  To resolve the MODEL089 error, you can take the following steps:
  
  
  Check the Data Model: Review the data model definition for the IO class (&1) and the specific attribute (&2).