How To Fix SIW090 - Table Type &1 defines no key fields although KEYDEF property is 'K'

SAP Error Message - Details

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 090

• Message text: Table Type &1 defines no key fields although KEYDEF property is 'K'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SIW090 - Table Type &1 defines no key fields although KEYDEF property is 'K' ?

  The SAP error message SIW090 indicates that there is a problem with the definition of a table type in your SAP system. Specifically, it states that the table type defined does not have any key fields, even though the KEYDEF property is set to 'K', which indicates that it should have key fields.
  
  Cause:
  
  Table Type Definition: The table type you are trying to use has been defined without any key fields. In SAP, a key field is necessary for certain operations, especially when dealing with internal tables that require unique identification of records.
  KEYDEF Property: The KEYDEF property being set to 'K' implies that the table type is expected to have key fields, but the actual definition does not comply with this expectation.
  
  
  Solution:
  
  
  Check Table Type Definition: 
  
  Go to the ABAP Dictionary (transaction SE11) and check the definition of the table type that is causing the error.
  Ensure that at least one field is