How To Fix WI303 - Error reading distribution list &

SAP Error Message - Details

• Message type: E = Error

• Message class: WI - BPT Workflow: Messages from Info System

• Message number: 303

• Message text: Error reading distribution list &

What causes this issue?

The function module <AB>SO_DLI_READ_API1</> terminated with an
exception. The return code was &V2&.

System Response

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

How to fix this error?

Return code,,Technical name,,Meaning
1,,DLI_NOT_EXIST,,Problem in the binding from the task to the rule. The
system cannot interpret the input parameters (name of distribution
list).
2,,OPERATION_NO_AUTHORIZATION,,The current user (you or the user
WF-BATCH) does not have read authorization for the folder in which the
distribution list is stored.
3,,PARAMETER_ERROR,,Internal error
4,,X_ERROR,,Internal error
INCLUDE NA_WF-ADMINISTRATOR OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message WI303 - Error reading distribution list & ?

  SAP Error Message:
  
  WI303 - Error reading distribution list &
  
  Cause:
  The error message WI303 occurs when the SAP system tries to read a distribution list (used in workflow processing) but fails. The ampersand (&) in the message is a placeholder for the distribution list ID or name that could not be read.
  Common causes include:
  
  The distribution list does not exist or has been deleted.
  The distribution list is inactive or locked.
  Authorization issues preventing the user or system from reading the distribution list.
  Inconsistencies or corruption in the distribution list data.
  Transport or client copy issues where the distribution list is missing in the target system.
  
  
  Explanation:
  In SAP Workflow, distribution lists are used to define groups of users or organizational units to whom workflow tasks can be sent. When a workflow step tries to send a task to a distribution list that cannot be found or accessed, the system raises this error.
  
  Solution:
  
  
  Check Distribution List Existence:
  
  Use transaction PPOCE (Workflow Builder) or PPOC (Workflow Customizing) to verify if the distribution list exists.
  Alternatively, use transaction SOST or SWI1 to check workflow logs and identify the distribution list causing the error.
  
  
  
  Verify Distribution List Status:
  
  Ensure the distribution list is active and not locked.
  Check if the distribution list is valid for the current client and system.
  
  
  
  Check Authorizations:
  
  Verify that the user or workflow runtime has the necessary authorizations to read the distribution list.
  Use transaction SU53 after the error occurs to check for missing authorizations.
  
  
  
  Recreate or Repair Distribution List:
  
  If the distribution list is corrupted or missing, recreate it or restore it from a backup.
  If the distribution list was transported, verify the transport logs and re-import if necessary.
  
  
  
  Check Workflow Configuration:
  
  Review the workflow definition to ensure the correct distribution list ID is used.
  Correct any hardcoded or outdated distribution list references.
  
  
  
  Client/Transport Issues:
  
  If the error occurs after a client copy or transport, verify that the distribution list exists in the target client.
  Re-import or recreate the distribution list in the target system.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  PPOCE - Workflow Builder
  PPOC - Workflow Customizing
  SWI1 - Workflow Log
  SOST - SAPconnect Send Requests (for email distribution lists)
  SU53 - Authorization Check
  
  
  
  SAP Notes:
  
  Search for SAP Notes related to error WI303 for specific patches or known issues.
  Example: SAP Note 123456 (hypothetical) might address distribution list reading issues.
  
  
  
  Workflow Tables:
  
  T77S0 - Distribution list header data
  T77S1 - Distribution list items
  
  
  
  Debugging:
  
  Use transaction SWUD or SWI1 to trace workflow execution.
  Debug the workflow step to see where the distribution list read fails.
  
  
  
  
  Summary:
  The WI303 error indicates that the SAP workflow engine cannot read the specified distribution list. The resolution involves verifying the existence, status, and authorizations of the distribution list, correcting workflow references, and ensuring proper transport and client setup.
  
  If you provide the exact distribution list ID or more context (workflow name, system environment), I can help with more targeted troubleshooting steps.