Message type: E = Error
Message class:  CNV_00001 - Message class for CWB settings maintenance programs 
Message number: 181
Message text: Without a method only one line is expected
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The SAP error message CNV_00001181 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the system expects a specific format or structure for the data being processed, and it has encountered a situation where it is not able to interpret the data correctly due to the absence of a method or a defined structure.
Cause: Data Structure Issues: The data being imported or processed may not conform to the expected structure. For example, if the system expects a certain number of fields or a specific format and receives less or more, this error can occur. Configuration Problems: There may be issues with the configuration of the migration project or the mapping of fields between the source and target systems. Missing Methods: If the migration process relies on specific methods or functions that are not defined or implemented, the
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