Message type: E = Error
Message class:  CNV_CMIS_G - CMIS: general messages 
Message number: 057
Message text: for Sender system: &1 &2
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_CMIS_G057 typically relates to issues encountered during data migration or conversion processes, particularly in the context of the SAP Conversion and Migration tools. This error message indicates that there is a problem with the sender system specified in the message, which is usually related to the configuration or data integrity.
Cause:
Configuration Issues: The sender system may not be properly configured, leading to communication or data retrieval problems. Data Integrity Problems: There may be inconsistencies or missing data in the sender system that prevent successful data transfer. Authorization Issues: The user or process attempting to access the sender system may not have the necessary permissions. Technical Errors: There could be underlying technical issues, such as network problems or system downtime.
Solution: Check Configuration: Verify that the sender system is correctly configured in the SAP system. Ensure that all necessary parameters are set up correctly. Data Validation: Review the data in the sender system for
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