How To Fix STC_TM198 - Task '&1' requires successor '&2' which is missing

SAP Error Message - Details

• Message type: E = Error

• Message class: STC_TM - Task List Manager Messages

• Message number: 198

• Message text: Task '&1' requires successor '&2' which is missing

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message STC_TM198 - Task '&1' requires successor '&2' which is missing ?

  The SAP error message STC_TM198 indicates that a task in a background job or a task chain is dependent on a successor task that is missing. This typically occurs in the context of SAP's Process Integration (PI) or Process Orchestration (PO) environments, where tasks are organized in a sequence, and one task cannot start until its predecessor has completed successfully.
  Cause:
  
  Missing Successor Task: The specified successor task (&2) is not defined in the task chain or job definition.
  Incorrect Task Configuration: The task may have been deleted or not properly configured, leading to a missing reference.
  Transport Issues: If the task chain was transported from one system to another, the successor task may not have been included in the transport.
  Changes in Task Dependencies: Changes in the task definitions or dependencies may have led to inconsistencies.
  
  Solution:
  
  
  Check Task Chain Configuration:
  
  Go to the transaction code for managing task chains (e.g., STC01 for task chains).
  Verify that the task chain includes the successor task (&2) and that it is correctly configured.
  
  
  
  Recreate Missing Task:
  
  If the successor task is indeed missing, you may need to recreate it or restore it from a backup if it was deleted.
  
  
  
  Review Task Dependencies:
  
  Ensure that all tasks in the chain are correctly defined and that their dependencies are properly set up.
  
  
  
  Transport Check:
  
  If the task chain was transported, check the transport logs to ensure that all necessary objects were included in the transport request.
  
  
  
  Adjust Task Sequence:
  
  If the successor task is not needed, you may adjust the task sequence to remove the dependency on the missing task.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to task chains and dependencies for any specific guidance or known issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  STC01: Manage task chains.
  STC02: Monitor task chains.
  STC03: Display task chain logs.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  System Logs: Review system logs for any additional error messages or warnings that may provide context for the issue.
  
  
  By following these steps, you should be able to identify the cause of the STC_TM198 error and implement a solution to resolve it.