How To Fix CNV_10020309 - &1 &2 has maximum target card. N, which is not allowed for intervals

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 309

• Message text: &1 &2 has maximum target card. N, which is not allowed for intervals

What causes this issue?

The system found that the maximum target cardinality determined for
&V1& &V2& is N, which is not allowed for intervals (for technical
reasons).
<zh>Note:</> The following example shows why a target cardinality of N
is not allowed.
<zh>Example:</> 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:
<zh>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, an
which in turn would result in serious performance issues. If, however,
there is exactly one target determination value, only a single access
is required.

System Response

If necessary, determine the system cardinality of &V1& &V2&. If the
target cardinality in this case is N as well, creation of intervals for
&V1& &V2& is not possible.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020309 - &1 &2 has maximum target card. N, which is not allowed for intervals ?

  The SAP error message CNV_10020309 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a target cardinality (the maximum number of records allowed) for a specific interval has been exceeded, which is not permitted in the context of the operation being performed.
  Cause:
  
  Cardinality Limit Exceeded: The error suggests that the maximum target cardinality for a specific interval has been reached. This means that the data being processed has more records than the system allows for that particular interval.
  Data Model Constraints: The underlying data model may have constraints that limit the number of records that can be associated with a particular entity or interval.
  Configuration Issues: There may be configuration settings in the migration tool or the target system that define limits on the number of records.
  
  Solution:
  
  Review Data: Check the data being migrated to ensure that it does not exceed the defined limits. You may need to filter or aggregate the data to fit within the allowed cardinality.
  Adjust Configuration: If possible, adjust the configuration settings in the migration tool or the target system to allow for a higher cardinality, if that aligns with your business requirements.
  Split Data: If the data set is too large, consider splitting it into smaller batches that can be processed sequentially, ensuring that each batch adheres to the cardinality limits.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using to understand the cardinality limits and how to manage them effectively.
  Error Logs: Check the error logs for more detailed information about the specific records causing the issue, which can help in troubleshooting.
  
  Related Information:
  
  SAP Notes: Look for relevant SAP Notes that may address this specific error or provide 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.
  Testing: Before performing large-scale migrations, conduct tests with smaller data sets to identify potential issues early in the process.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.