How To Fix CNV_10020306 - Target cardinality N is not allowed for intervals

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 306

• Message text: Target cardinality N is not allowed for intervals

What causes this issue?

The system found that the source determination value &V1& has target
determinaton value &V2& as well as target determination value &V3&
assigned. This corresponds to a target cardinality of N, which is not
allowed for intervals (for technical reasons).

System Response

Creation of intervals is not possible for this path.
&NOTE&
The following example shows why a target cardinality of N is not
allowed.

How can this happen?

Purchasing organizations 0001 to 0010 are assigned to plant 0001.
Purchasing organizations 0002 to 0006 are additionally assigned to plant
0002, and purchasing organizations 0007 to 0009 are additionally
assigned to plant 0003. The interval table would then look as follows:
DTVAL_S_HIGH,,DTVAL_S_LOW,,DTVAL_T
0006 ,,0002 ,,0002
0009 ,,0007 ,,0003
0010 ,,0001 ,,0001
To find the related plants for purchasing organization 0005, the program
would have to read records 1 and 3. However another relevant record
might occur at any other place in the table, which means that the table
must be processed completely every time it is accessed, and which in
turn would result in serious performance issues. If, however, there is
exactly one target determination value, only a single access is
required.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020306 - Target cardinality N is not allowed for intervals ?

  The SAP error message CNV_10020306: Target cardinality N is not allowed for intervals typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or during the execution of a conversion program. This error indicates that there is an issue with the cardinality settings for the target data structure, specifically when dealing with intervals.
  Cause:
  
  Cardinality Mismatch: The error arises when the target structure is defined to accept multiple entries (cardinality N), but the source data being processed is in the form of intervals that should only allow a single entry or a specific range.
  Data Model Configuration: The data model or mapping configuration may not be set up correctly, leading to a conflict between the expected data format and the actual data being processed.
  Incorrect Mapping: The mapping of source fields to target fields may not align correctly, especially if the source data is expected to be a single value but is being treated as a collection.
  
  Solution:
  
  Review Data Mapping: Check the mapping configuration between the source and target structures. Ensure that the intervals are correctly defined and that the target structure can accommodate the expected data format.
  Adjust Cardinality Settings: If the target structure is incorrectly set to allow multiple entries (N), consider changing it to allow only a single entry (1) if that aligns with the source data.
  Data Validation: Validate the source data to ensure that it conforms to the expected format. If the source data contains intervals, ensure that the target structure is designed to handle such cases.
  Consult Documentation: Refer to SAP documentation or guides related to the specific data migration tool or process you are using. There may be specific instructions or configurations required for handling intervals.
  Error Handling: Implement error handling in your migration process to catch and log such errors, allowing for easier troubleshooting in the future.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling cardinality issues during data migration.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Data Migration Tools: Familiarize yourself with the specific data migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) as they may have unique configurations or settings that need to be adjusted.
  
  By addressing the cause of the error and implementing the suggested solutions, you should be able to resolve the CNV_10020306 error and successfully complete your data migration or conversion process.