How To Fix CMMD026 - Insert/delete/update command delivered an error

SAP Error Message - Details

• Message type: E = Error

• Message class: CMMD -

• Message number: 026

• Message text: Insert/delete/update command delivered an error

What causes this issue?

An insert/update/delete command on the database could not be executed.
An unforeseen error occurred in the program. The program tried to write
to the database a data record that was inadmissable.

System Response

All admissable changes have been saved to the database. Inadmissable
changes have not been saved.

How to fix this error?

Although inadmissable database access does not lead to incorrect data,
it must be avoided for performance reasons. Create a CSN message.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CMMD026 - Insert/delete/update command delivered an error ?

  The SAP error message CMMD026, which states "Insert/delete/update command delivered an error," typically occurs during database operations when there is an issue with executing a command that modifies data in the database. This error can arise from various causes, and understanding these can help in troubleshooting and resolving the issue.
  Possible Causes:
  
  Database Constraints: The operation may violate database constraints such as primary key, foreign key, unique constraints, or check constraints.
  Data Type Mismatch: The data being inserted or updated may not match the expected data type of the database column.
  Null Values: Attempting to insert or update a column that does not allow null values with a null value.
  Locking Issues: The database table may be locked by another transaction, preventing the current operation from proceeding.
  Insufficient Permissions: The user executing the command may not have the necessary permissions to perform the insert, update, or delete operation.
  Triggers: Database triggers may be causing the operation to fail due to additional logic that is executed during the data modification.
  Database Corruption: In rare cases, there may be corruption in the database that is causing the operation to fail.
  
  Solutions:
  
  Check Constraints: Review the database constraints to ensure that the data being modified adheres to all rules.
  Data Validation: Validate the data types and ensure that the values being inserted or updated are compatible with the database schema.
  Null Handling: Ensure that no null values are being inserted into columns that do not allow them.
  Transaction Management: Check for any locks on the table and ensure that transactions are being managed properly. You may need to wait for other transactions to complete or release locks.
  Permissions Review: Verify that the user has the necessary permissions to perform the operation. If not, adjust the permissions accordingly.
  Debugging Triggers: If there are triggers associated with the table, review their logic to ensure they are not causing the error.
  Database Health Check: Perform a health check on the database to identify any potential corruption or issues.
  
  Related Information:
  
  Transaction Logs: Check the transaction logs for more detailed error messages that can provide insight into what went wrong.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Database Documentation: Refer to the documentation for the specific database being used (e.g., HANA, Oracle, SQL Server) for more information on error codes and troubleshooting steps.
  
  Conclusion:
  Resolving the CMMD026 error requires a systematic approach to identify the root cause. By checking constraints, validating data, managing transactions, and reviewing permissions, you can often resolve the issue effectively. If the problem persists, consider reaching out to SAP support for further assistance.