How To Fix STC_SC_TASKS191 - Source system should differ to target system

SAP Error Message - Details

• Message type: E = Error

• Message class: STC_SC_TASKS - System Copy Task Messages

• Message number: 191

• Message text: Source system should differ to target system

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message STC_SC_TASKS191 - Source system should differ to target system ?

  The SAP error message STC_SC_TASKS191, which states "Source system should differ to target system," typically occurs in the context of system landscape management, particularly when dealing with system copies, transports, or system migrations. This error indicates that the source system and the target system are the same or not properly differentiated in the context of the operation being performed.
  Cause:
  
  Same Source and Target System: The most common cause of this error is that the source and target systems are incorrectly configured to be the same system. This can happen during system copy operations or when setting up transport routes.
  Incorrect Configuration: There may be a misconfiguration in the transport management system (TMS) or in the system landscape directory (SLD) that leads to the systems being recognized as identical.
  Transport Request Issues: If you are trying to transport changes from a system to itself, this error will occur.
  
  Solution:
  
  
  Verify System Configuration:
  
  Check the configuration of your transport routes in the Transport Management System (TMS). Ensure that the source and target systems are correctly defined and that they are indeed different systems.
  Use transaction code STMS to access the Transport Management System and review the configuration.
  
  
  
  Check System Landscape Directory (SLD):
  
  Ensure that the systems are correctly registered in the SLD. You can use transaction code SLD to check the system entries.
  Make sure that the source and target systems are distinct and properly identified.
  
  
  
  Review Transport Requests:
  
  If you are working with transport requests, ensure that you are not trying to transport changes to the same system. If necessary, create a new transport request for the correct target system.
  
  
  
  System Copy or Migration:
  
  If you are performing a system copy or migration, ensure that the source and target systems are correctly defined in the process. Follow the guidelines provided by SAP for system copies to avoid this error.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as STMS for transport management, SLD for system landscape management, and ST22 for dump analysis if needed.
  SAP Documentation: Refer to the official SAP documentation for detailed guidance on system landscape management and transport management.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the STC_SC_TASKS191 error and ensure that your source and target systems are correctly configured for the operations you are attempting to perform.