How To Fix /BOBF/TOOLS_CC031 - Action has cardinality one, but IT_KEY contains more than one key

SAP Error Message - Details

• Message type: E = Error

• Message class: /BOBF/TOOLS_CC -

• Message number: 031

• Message text: Action has cardinality one, but IT_KEY contains more than one key

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /BOBF/TOOLS_CC031 - Action has cardinality one, but IT_KEY contains more than one key ?

  The SAP error message /BOBF/TOOLS_CC031 indicates that there is a cardinality issue in your Business Object Framework (BOF) implementation. Specifically, it means that an action you are trying to execute expects a single key (cardinality one), but the input provided (IT_KEY) contains multiple keys.
  Cause:
  
  Cardinality Mismatch: The action you are trying to perform is defined to operate on a single instance of a business object, but the input you provided includes multiple keys, which suggests that you are trying to operate on multiple instances.
  Incorrect Input Data: The data being passed to the action may not be formatted correctly, leading to the inclusion of multiple keys when only one is expected.
  Configuration Issues: There may be a misconfiguration in the business object or action definition that does not align with the expected input.
  
  Solution:
  
  Check Input Data: Review the data being passed to the action. Ensure that IT_KEY contains only one key. If you need to process multiple keys, you may need to call the action multiple times, once for each key.
  Modify Action Call: If your business logic requires processing multiple keys, consider modifying the action to handle multiple instances if that aligns with your business requirements.
  Review Action Definition: Check the definition of the action in the Business Object Framework to ensure that it is correctly set up to handle the expected input. If it is supposed to handle multiple keys, you may need to adjust the cardinality settings.
  Debugging: Use debugging tools to trace the execution and see where the multiple keys are being introduced. This can help identify if there is a logic error in the code that prepares the input.
  
  Related Information:
  
  Business Object Framework (BOF): This is a framework in SAP that allows for the creation and management of business objects. Understanding how actions and keys work within this framework is crucial for troubleshooting.
  Cardinality: In the context of SAP BOF, cardinality refers to the number of instances that an action can handle. Cardinality one means that the action is designed to work with a single instance.
  SAP Documentation: Refer to the official SAP documentation for the Business Object Framework for more details on how to define actions and manage keys.
  
  By following these steps, you should be able to resolve the error and ensure that your actions are executed correctly within the SAP system.