How To Fix OL845 - No more key fields can be set

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 845

• Message text: No more key fields can be set

What causes this issue?

The key fields of an object cannot be changed once an attribute has
been accessed or a method called (&V1&).

How to fix this error?

If you want to access an object with other key fields, create a new
object using SWO_CREATE. If you no longer require the old object, you
can release it with SWO_FREE.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL845 - No more key fields can be set ?

  The SAP error message OL845 "No more key fields can be set" typically occurs in the context of defining or modifying a table or data structure in the ABAP Dictionary (SE11) or when working with data models in SAP. This error indicates that you have reached the maximum number of key fields allowed for a particular table or structure.
  Cause:
  
  Maximum Key Fields Exceeded: In SAP, a database table can have a maximum of 16 key fields. If you attempt to add more than this limit, you will encounter the OL845 error.
  Incorrect Table Design: Sometimes, the design of the table may not be optimal, leading to unnecessary key fields being defined.
  
  Solution:
  
  Review Key Fields: Check the existing key fields of the table or structure. Determine if all of them are necessary for the unique identification of records.
  Remove Unnecessary Key Fields: If you find that some key fields are not essential, consider removing them to stay within the limit.
  Reassess Table Design: If the table design is not optimal, you may need to redesign the table. This could involve consolidating fields or changing the way data is structured.
  Use Alternative Approaches: If you need to maintain more unique identifiers, consider using a combination of key fields or creating a separate table to handle additional identifiers.
  
  Related Information:
  
  Key Fields in SAP: Key fields are used to uniquely identify records in a database table. They are crucial for ensuring data integrity and efficient data retrieval.
  Database Table Limits: Familiarize yourself with the limits imposed by the SAP database regarding the number of key fields, data types, and other constraints.
  ABAP Dictionary (SE11): Use transaction SE11 to manage database tables and structures, where you can view and modify key fields.
  Documentation: Refer to SAP documentation or help resources for best practices in table design and key field management.
  
  If you continue to face issues or if the table design is complex, consider consulting with an SAP Basis or ABAP expert for further assistance.