Message type: E = Error
Message class:  CNV_CMIS_M_10 - Message class for Migration 
Message number: 023
Message text: Error while checking mapping for client transfer
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.
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The SAP error message CNV_CMIS_M_10023 typically occurs during the client transfer process, particularly when there are issues related to the mapping of data between the source and target clients. This error is part of the SAP Conversion and Migration tools, which are used to facilitate data transfer and transformation during system migrations or upgrades.
Cause: The error can be caused by several factors, including: Mapping Issues: There may be inconsistencies or errors in the mapping configuration between the source and target clients. This could involve missing fields, incorrect data types, or incompatible structures. Data Integrity Problems: The data being transferred may not meet the required integrity constraints, such as foreign key relationships or mandatory fields. Configuration Errors: Incorrect settings in the migration or conversion tools can lead to this error. This includes issues in the configuration of the client transfer process itself. Authorization Issues: The user executing the transfer may not have the necessary authorizations to
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What causes this issue?  The target logical system name that is contained in the mapping table is &V1&. The RFC target logical system name is ...
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