How To Fix COM_DML_DATASET203 - Set type &: only one row can be specified

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_DML_DATASET - MDF: Object Data

• Message number: 203

• Message text: Set type &: only one row can be specified

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message COM_DML_DATASET203 - Set type &: only one row can be specified ?

  The SAP error message COM_DML_DATASET203 with the description "Set type &: only one row can be specified" typically occurs in the context of data manipulation language (DML) operations, particularly when working with datasets in SAP. This error indicates that a certain operation is expecting a single row of data, but multiple rows are being provided instead.
  Cause:
  
  
  Multiple Rows Returned: The most common cause of this error is that a query or operation is returning multiple rows when only one row is expected. This can happen in various scenarios, such as:
  
  A SELECT statement that retrieves multiple records.
  A function or method that is designed to handle a single record but is being passed a dataset with multiple records.
  
  
  
  Incorrect Logic in Code: There may be a logical error in the ABAP code or configuration that leads to the retrieval of multiple records when only one is needed.
  
  
  Data Integrity Issues: In some cases, the underlying data may not conform to expected constraints, leading to multiple records being returned where a unique record is expected.
  
  
  Solution:
  
  
  Review the Query: Check the SQL or ABAP query that is being executed. Ensure that it is designed to return a single row. You can use SELECT SINGLE instead of SELECT if you are only interested in one record.
  
  
  Add Filters: If the query is intended to return a single record, ensure that appropriate filters (WHERE clauses) are applied to limit the result set to one row.
  
  
  Check Data Model: Review the data model and ensure that the expected uniqueness constraints are enforced. If a unique key is expected, make sure that the data adheres to this constraint.
  
  
  Debugging: Use debugging tools in SAP to step through the code and identify where the multiple rows are being generated. This can help pinpoint the exact location of the issue.
  
  
  Error Handling: Implement error handling in your code to manage situations where multiple rows might be returned. This could involve logging the error, notifying the user, or taking corrective action.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  Documentation: Review the relevant SAP documentation for the specific function or method you are using to understand its expected behavior and constraints.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.