How To Fix WL818 - Table & cannot be written

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 818

• Message text: Table & cannot be written

What causes this issue?

Possible causes of this error are:
a header table could not be when a work item was created
a dependent table could not be written when a work item was created
a table with the start times could not be written during a status
change.

System Response

The work item was not created completely or the status transition was
terminated.

How to fix this error?

Check whether the work item was created (completely) by displaying it.
Check the current status of the work item. Contact your workflow system
administrator to search for, correct, or delete inconsistencies or work
items which could not be found.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WL818 - Table & cannot be written ?

  The SAP error message WL818, which states "Table & cannot be written," typically indicates that there is an issue with writing data to a specific database table. This error can arise due to various reasons, and understanding the cause is essential for finding an appropriate solution. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Table Locking: The table may be locked by another transaction or user, preventing any write operations.
  Authorization Issues: The user may not have the necessary authorizations to write to the specified table.
  Database Constraints: There may be constraints (like foreign key constraints) that are preventing the write operation.
  Technical Issues: There could be issues with the database itself, such as corruption or connectivity problems.
  Data Consistency: The data being written may violate the integrity rules defined for the table (e.g., null values in non-nullable fields).
  Transport Issues: If the table is part of a transport request, it may be in a state that prevents writing.
  
  Solutions:
  
  Check Table Locks: Use transaction code SM12 to check for any locks on the table. If you find locks that are not needed, you can release them.
  Review Authorizations: Ensure that the user has the necessary authorizations to perform write operations on the table. You can check this using transaction SU53 or by reviewing the user's roles and authorizations.
  Examine Constraints: Check for any constraints on the table that might be causing the write operation to fail. You can use transaction SE11 to view the table structure and constraints.
  Database Health Check: If you suspect a database issue, perform a health check on the database. This may involve checking for errors in the database logs or running consistency checks.
  Data Validation: Ensure that the data being written adheres to the table's structure and constraints. Validate the data before attempting to write it.
  Transport Management: If the issue is related to transport, ensure that the transport request is correctly released and that the table is in a writable state.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (lock entries), SU53 (authorization check), SE11 (data dictionary), and SE14 (database utility).
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to the WL818 error.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.