Message type: E = Error
Message class:  CNV_20410_CHECK - Messages for ERKRS checks 
Message number: 040
Message text: Target op.concern &1 without number range (&2, &3)
The target operating concern &V1& is without number range (&V2&, &V3&).
Warning
The number conversion engine creates automatically the missing number
range in the target operating concern. The number intervals must be
mapped so that they are disjoint. After the conversion the number range
is without an assigned group or element.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20410_CHECK040 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 there is an issue with the target object concerning the number range assignment.
Cause: The error message CNV_20410_CHECK040 is triggered when the system detects that a target object (e.g., a business object or a master data record) is expected to have a number range assigned, but it does not. The specific components of the error message provide the following details: Target op.concern &1: This indicates the target object or operation that is being processed. without number range (&2, &3): This indicates that the target object is missing a number range assignment, which is necessary for the operation to proceed.
Solution: To resolve this error, you can follow these steps: Check Number Range Configuration: Go to the transaction code SNRO (Number Range Objects) in SAP. Look for the number range
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