How To Fix CNV_20100621 - Scenario &1 and scenario &2 cannot run together

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20100 - Messageclass for chart of account conversion

• Message number: 621

• Message text: Scenario &1 and scenario &2 cannot run together

What causes this issue?

You want to change multiple charts of accounts in one step. To this
purpose, you made the corresponding number of mapping entries for charts
of accounts in the view <ZK>Old/new chart of accounts </>of the activity
<ZK>Specify Mapping Values (Chart of Accounts)</>.

System Response

The system now compares the conversion requirements that result from
each mapping entry, and checks if they can be combined for processing.
A mandatory prerequisite for this is that the indicator for copying a
chart of accounts is set in the same way in all mapping entries (
<ZK>Copy Rows</> indicator in the view <ZK>Old/new chart of accounts
</>). Here, this was not the case.
If the <ZK>Copy Rows</> indicator is set, the master data of the old
chart of accounts is copied (and given a new ID) when the old chart of
accounts is converted into the new chart of accounts (and, if necessary,
accounts are merged or renamed), while the old chart of accounts
continues to exist without any changes in the system after the
conversion.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the mapping again and make sure that the settings really reflect
what you plan to do.
If you cannot unify the indicators for logical reasons, you have to do
the conversions using separate packages.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100621 - Scenario &1 and scenario &2 cannot run together ?

  The SAP error message CNV_20100621 indicates that two scenarios (denoted as &1 and &2) cannot be executed simultaneously. This error typically arises during data migration or system conversion processes, particularly when using SAP's tools for data transfer or system upgrades.
  Cause:
  The primary cause of this error is that the two scenarios in question are likely conflicting or dependent on the same resources or data sets. This can happen in various situations, such as:
  
  Resource Locking: Both scenarios may be trying to access the same database tables or resources, leading to a conflict.
  Data Dependencies: One scenario may depend on the completion of another scenario, and running them concurrently could lead to data integrity issues.
  Configuration Issues: There may be configuration settings that prevent the simultaneous execution of these scenarios.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Sequential Execution: Run the scenarios one after the other instead of concurrently. Ensure that the first scenario completes successfully before starting the second one.
  
  
  Check Dependencies: Review the documentation or configuration of the scenarios to understand their dependencies. Make sure that any prerequisites are met before executing the scenarios.
  
  
  Resource Management: Ensure that the resources (like database connections, memory, etc.) are adequately allocated and not being used by another process.
  
  
  Consult Documentation: Refer to the SAP documentation related to the specific scenarios you are working with. There may be specific guidelines or recommendations for running these scenarios.
  
  
  Error Logs: Check the error logs for more detailed information about the conflict. This can provide insights into what specifically is causing the issue.
  
  
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They may have additional insights or patches that can help resolve the conflict.
  
  
  Related Information:
  
  SAP Notes: Look for relevant SAP Notes that might address this specific error or provide guidance on the scenarios involved.
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit or similar tools, ensure you are following the best practices outlined in the tool's documentation.
  Community Forums: Check SAP Community forums or other user groups for discussions related to this error. Other users may have encountered similar issues and can provide solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to allow your scenarios to run successfully.