Message type: E = Error
Message class:  CNV_PE - General messages for posting engine 
Message number: 448
Message text: Reference parameter &1 does not exist in interface &2
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The SAP error message CNV_PE448 indicates that there is a reference parameter that is expected in a specific interface but does not exist. This error typically arises during data migration or conversion processes, particularly when using SAP's data migration tools or during the execution of conversion programs.
Cause: Missing Parameter: The reference parameter specified in the error message (&1) is not defined in the interface (&2). This could be due to a misconfiguration or an oversight in the data migration setup. Incorrect Mapping: The mapping of fields or parameters between the source and target systems may not be correctly defined, leading to the absence of expected parameters. Version Mismatch: If the interface has been updated or changed in a newer version of the software, the parameters may have been altered or removed, causing the error. Custom Development: If there are custom developments or enhancements in the interface, they may not align with the expected parameters.
Solution: Check
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