How To Fix IUUC_MOD027 - Invalid system type; use system type S or R

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MOD - Message Class for IUCC Model Classes (Generics)

• Message number: 027

• Message text: Invalid system type; use system type S or R

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MOD027 - Invalid system type; use system type S or R ?

  The SAP error message IUUC_MOD027 indicates that there is an issue with the system type configuration in the SAP Landscape Transformation (SLT) replication setup. This error typically arises when the system type specified in the configuration is not valid or recognized by the SLT framework.
  Cause:
  The error message "Invalid system type; use system type S or R" suggests that the system type defined in the SLT configuration is neither 'S' (Source) nor 'R' (Receiver). This can occur due to:
  
  Incorrect Configuration: The system type may have been incorrectly set during the configuration of the SLT system.
  Typographical Error: There might be a typo or an incorrect value entered in the configuration settings.
  System Type Not Supported: The system type being used is not supported by the SLT framework.
  
  Solution:
  To resolve the IUUC_MOD027 error, follow these steps:
  
  
  Check Configuration:
  
  Go to the SLT configuration transaction (usually LTRC).
  Verify the system type settings for the source and target systems.
  Ensure that the source system is set to 'S' and the target system is set to 'R'.
  
  
  
  Correct the System Type:
  
  If you find that the system type is incorrectly set, change it to the appropriate value ('S' for source systems and 'R' for receiver systems).
  Save the changes and restart the SLT replication process.
  
  
  
  Review Documentation:
  
  Consult the SAP documentation for SLT to ensure that you are using the correct system types and configurations.
  
  
  
  Check for Updates:
  
  Ensure that your SLT system is up to date with the latest patches and updates from SAP, as there may be fixes related to this issue.
  
  
  
  Consult SAP Support:
  
  If the issue persists after checking the configuration and making necessary changes, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  SLT Documentation: Review the official SAP documentation for Landscape Transformation to understand the configuration settings and system types.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTRC (SLT Configuration), LTMOM (Modeling), and SLT Monitoring transactions for troubleshooting.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to resolve the IUUC_MOD027 error and ensure that your SLT configuration is correctly set up for data replication.