How To Fix WER084 - Impossible add rule because it uses a different structure (&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 084

• Message text: Impossible add rule because it uses a different structure (&1)

Self-Explanatory Message

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• What is the cause and solution for SAP error message WER084 - Impossible add rule because it uses a different structure (&1) ?

  SAP Error Message:
  
  WER084 - Impossible add rule because it uses a different structure (&1)
  
  Cause:
  This error occurs in SAP Workflow when you try to add a rule to a container element, but the rule uses a different data structure than the container element expects. In other words, the data type or structure of the rule's output does not match the data type or structure of the container element to which you are trying to assign it.
  For example, if the container element is defined as a structure ZSTRUCT_A, and the rule returns a structure ZSTRUCT_B, SAP will raise this error because the structures are incompatible.
  
  Explanation:
  
  Workflow container elements have defined data types (structures, tables, elementary types).
  Rules used to fill or assign values to these container elements must return data of the same type.
  If the rule returns a different structure or data type, SAP cannot assign it, hence the error.
  
  
  Solution:
  
  
  Check the container element's data type:
  
  Go to the workflow container element definition.
  Note the data type or structure assigned.
  
  
  
  Check the rule's return type:
  
  Open the rule you are trying to add.
  Verify the return type or the data type of the rule's output.
  
  
  
  Make sure both data types match:
  
  If they differ, either:
  
  Change the rule to return the correct data type.
  Or change the container element's data type to match the rule's output (if appropriate).
  
  
  
  
  
  Use conversion or mapping if necessary:
  
  If the structures are similar but not identical, consider creating a mapping rule or a transformation to convert one structure to the other before assignment.
  
  
  
  Re-add the rule after correction:
  
  After ensuring the data types match, add the rule again to the container element.
  
  
  
  
  Related Information:
  
  This error is common when workflows are transported between systems and structures differ.
  Always ensure that custom structures used in workflows are consistent across systems.
  Use transaction SWDD (Workflow Builder) to check container elements and rules.
  Use transaction SE11 to check structure definitions.
  For complex data types, consider using interface methods or function modules to convert data before assignment.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WER084 - Impossible add rule because it uses a different structure (&1)
  
  
  Cause
  Rule's return type differs from container element's data type
  
  
  Solution
  Align data types by adjusting rule or container element; use mapping if needed
  
  
  Tools
  SWDD (Workflow Builder), SE11 (Data Dictionary), Rule Editor
  
  
  Notes
  Check transport consistency; ensure structures are identical across systems
  
  
  
  
  If you need help identifying the exact structures or adjusting the rule, please provide the workflow name, container element, and rule details.