Message type: E = Error
Message class:  CNV_IUUC_REPL_ADV_SE - MEssage class for package CNV_IUUC_REPL_ADV_SETTINGS 
Message number: 131
Message text: Function not available for source system
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
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.
Unfortunately, there isn't any extra information in this error notice.
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The SAP error message CNV_IUUC_REPL_ADV_SE131 typically indicates that a function or feature is not available for the specified source system in the context of SAP's data replication or migration processes, particularly when using the SAP Landscape Transformation (SLT) Replication Server.
Cause: Unsupported Source System: The source system you are trying to connect to may not be supported for the specific replication or transformation function you are attempting to use.
Configuration Issues: There may be configuration issues in the SLT setup that prevent the function from being recognized or executed. Version Compatibility: The version of the source system may not be compatible with the SLT version or the specific function you are trying to use. Missing Components: Required components or add-ons may not be installed or activated in the source system.
Solution: Check Compatibility: Verify that the source system is compatible with the SLT version and the specific function you are trying to use. Refer to SAP documentation
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