How To Fix IUUC_MAIN129 - In system &1, data class &2 is not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 129

• Message text: In system &1, data class &2 is not defined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN129 - In system &1, data class &2 is not defined ?

  The SAP error message IUUC_MAIN129 indicates that in the specified system (denoted by &1), a particular data class (denoted by &2) is not defined. This error typically arises in the context of SAP Landscape Transformation (SLT) or when working with data replication and data provisioning scenarios.
  Cause:
  
  Undefined Data Class: The data class specified in the error message is not defined in the target system. This could happen if the data class was not created or if there is a mismatch in the configuration between the source and target systems.
  Configuration Issues: There may be issues in the configuration settings of the SLT system or the target database that prevent the data class from being recognized.
  Transport Issues: If the data class was recently transported from another system, it may not have been properly imported or activated in the target system.
  
  Solution:
  
  
  Define the Data Class:
  
  Check the target system to see if the data class exists. You can do this by navigating to the Data Dictionary (SE11) and searching for the data class.
  If it does not exist, you will need to create it. This can be done by defining the data class in the Data Dictionary and ensuring it is properly configured.
  
  
  
  Check Configuration:
  
  Review the SLT configuration settings to ensure that the data class is correctly specified and that there are no discrepancies between the source and target systems.
  Ensure that the relevant tables and structures are correctly defined in both systems.
  
  
  
  Transport and Activation:
  
  If the data class was supposed to be transported from another system, verify that the transport request was successfully imported and activated in the target system.
  If necessary, re-transport the data class or manually create it in the target system.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to SLT and data classes for any specific instructions or troubleshooting steps that may apply to your situation.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest patches and updates, as there may be fixes or enhancements related to this issue.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like SE11 (Data Dictionary), SLT Configuration (transaction LTRC), and SLT Monitoring (transaction LTRC) to check configurations and definitions.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to resolve the IUUC_MAIN129 error and ensure that the data class is properly defined in your SAP system.