Message type: E = Error
Message class:  CNV_DMC_SIN_AM - Messages for Business Address Services 
Message number: 218
Message text: &1 must have length &2 or &3
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The SAP error message CNV_DMC_SIN_AM218 typically indicates an issue related to data conversion or migration, particularly in the context of the SAP Data Migration Cockpit (DMC). The message suggests that a certain field (denoted by &1) must have a specific length, either &2 or &3, but the data being processed does not meet this requirement.
Cause: Data Length Mismatch: The most common cause of this error is that the data being imported or migrated does not conform to the expected length constraints defined in the target system. For example, if a field is defined to accept a maximum of 10 characters, but the incoming data has 12 characters, this error will be triggered. Incorrect Mapping: There may be an issue with how the fields are mapped between the source and target systems, leading to incorrect data lengths. Data Quality Issues: The source data may contain unexpected characters or formatting that causes the length to
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