How To Fix RS_B4H_TRANSFER_APD020 - Generator not found for map object '&1'. (Predecessor)

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_B4H_TRANSFER_APD -

• Message number: 020

• Message text: Generator not found for map object '&1'. (Predecessor)

What causes this issue?

Each map object is generated by its own generator. This generator
contains important information about generated object. If generator is
not found generation of map object was not successful. See log of
generation process to find any generation errors.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RS_B4H_TRANSFER_APD020 - Generator not found for map object '&1'. (Predecessor) ?

  The SAP error message RS_B4H_TRANSFER_APD020 indicates that there is a problem with the data transfer process in SAP BW (Business Warehouse) related to a specific map object. The message states that a generator for the specified map object (denoted by &1) could not be found, which typically means that the system is unable to locate the necessary mapping or transformation logic required to process the data.
  Causes:
  
  Missing or Incomplete Mapping: The mapping object that is supposed to be used for the data transfer may not be defined correctly or is missing entirely.
  Incorrect Configuration: The configuration settings for the data transfer process (DTP) may not be set up properly, leading to the inability to find the required generator.
  Transport Issues: If the mapping object was recently transported from another system, it may not have been transported correctly, or dependencies may be missing.
  Versioning Issues: There may be version mismatches between the source and target systems, especially if the mapping was created in a different version of SAP BW.
  
  Solutions:
  
  Check Mapping Object: Verify that the mapping object exists and is correctly defined in the system. You can do this by navigating to the relevant area in the SAP BW modeling tools.
  Recreate or Adjust Mapping: If the mapping object is missing or incorrect, you may need to recreate it or adjust the existing one to ensure it is properly configured.
  Review DTP Settings: Check the settings of the Data Transfer Process (DTP) to ensure that it is correctly configured to use the appropriate mapping object.
  Transport Check: If the mapping was recently transported, check the transport logs for any errors and ensure that all necessary objects were included in the transport.
  System Consistency Check: Run consistency checks in the SAP BW system to identify any inconsistencies that may be causing the issue.
  Consult Documentation: Refer to SAP documentation or notes related to the specific error message for additional troubleshooting steps or patches that may resolve the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) and RSCUSTV10 (DTP settings) to help navigate and troubleshoot the issue.
  Community Forums: Consider searching or posting in SAP community forums or SAP support channels for additional insights from other users 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.