How To Fix VVSCDI020 - Rollback must be executed by caller

SAP Error Message - Details

• Message type: E = Error

• Message class: VVSCDI - Messages for Transferring Scheduling Items

• Message number: 020

• Message text: Rollback must be executed by caller

What causes this issue?

An error occurred when calling up the ISCD_SCPOS_MAINTAIN function
module. As the I_ERROR_ROLLBACK parameter was filled with <ZK>space</>,
no Rollback was executed.

System Response

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?

Implement a Rollback if errors occur. You can find information about
this in the E_ERROR_INFO parameter.
Please note that the Rollback does not undo parts of the processing
step, if these have already been written to the database as a result of
the I_COMMIT_BETW = <ZK>X</> parameter.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VVSCDI020 - Rollback must be executed by caller ?

  The SAP error message VVSCDI020: Rollback must be executed by caller typically occurs in the context of a database transaction where a rollback operation is attempted in a way that is not allowed by the current transaction context. This error is often related to the handling of database transactions in ABAP programs or function modules.
  Cause:
  
  Transaction Context: The error usually arises when a rollback is attempted in a context where it is not permitted. For example, if a function module or method tries to perform a rollback while it is not the caller of the transaction, SAP will raise this error.
  Nested Transactions: If there are nested transactions, and the inner transaction tries to perform a rollback, it can lead to this error since rollbacks should be managed by the outer transaction.
  Error Handling: Improper error handling in the code can also lead to this situation, where a rollback is triggered without the proper context.
  
  Solution:
  
  Review Transaction Logic: Check the logic of your ABAP program or function module to ensure that rollbacks are only called in the appropriate context. Ensure that the caller of the transaction is the one executing the rollback.
  Error Handling: Implement proper error handling to manage exceptions and ensure that rollbacks are only executed when necessary and in the correct context.
  Use COMMIT and ROLLBACK: Ensure that you are using COMMIT WORK and ROLLBACK WORK appropriately. Only the top-level transaction should handle these commands.
  Debugging: Use the ABAP debugger to trace the execution flow and identify where the rollback is being called incorrectly. Look for nested function calls or methods that might be causing the issue.
  Consult Documentation: Review SAP documentation or notes related to transaction handling and error messages for additional insights.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context on transaction handling.
  ABAP Documentation: Familiarize yourself with the ABAP programming guidelines regarding database transactions, especially concerning COMMIT and ROLLBACK.
  Community Forums: Consider searching or posting in SAP community forums or discussion groups for insights from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.