Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 511
Message text: For intern. num. gen. obj. No. type &, no determ. has been defined yet
Internally numbered general object number type is defined as a deletion
criterion. However no determination rule has been defined.
Information message message.
If you want to define a determination logic for the internally numbered
general object number type, you can enter the determination rule via
the maintenance tansaction CNV_20551_OBJ. (in the menu for the relevant
general object number type).
Otherwise, the respective general object number type will appear as a
deletion criterion in step 'Maintain other objects (without pre-defined
determination)' in phase B.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV20551511 typically relates to issues with the internal number generation for objects in the SAP system. This error indicates that there is no determination defined for the specified object type, which means that the system cannot generate a number for that object.
Cause: Missing Configuration: The most common cause of this error is that the internal number range for the specified object type has not been configured in the system. Object Type Not Defined: The object type you are trying to use may not be defined in the system, or it may not have a corresponding number range assigned to it. Transport Issues: If the configuration was recently transported from another system, it may not have been set up correctly in the target system.
Solution: Check Number Range Configuration: Go to the relevant configuration transaction (e.g., SNRO for number ranges). Check if the number range object for the specified type is defined. If it is
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