How To Fix IUUC_MAIN189 - No objects to be processed - hash-based parallelization used?

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 189

• Message text: No objects to be processed - hash-based parallelization used?

What causes this issue?

No objects for which a parallelization of the replication might be
calculated have been found.

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?

A possible reason is that the hash-based parallelization is configured,
in which case this activity is obsolete.

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 IUUC_MAIN189 - No objects to be processed - hash-based parallelization used? ?

  The SAP error message IUUC_MAIN189, which states "No objects to be processed - hash-based parallelization used," typically occurs in the context of SAP Landscape Transformation (SLT) replication. This message indicates that the system did not find any objects to process during a replication job, and it is related to the use of hash-based parallelization for data processing.
  Cause:
  
  
  No Changes Detected: The most common reason for this message is that there are no changes in the source tables that need to be replicated to the target system. This can happen if the source data has not been modified since the last replication run.
  
  
  Configuration Issues: There may be issues with the configuration of the SLT system, such as incorrect table settings or filters that prevent data from being processed.
  
  
  Data Volume: If the volume of data is low or if the data is being processed in a way that does not require any changes to be replicated, this message can appear.
  
  
  Hash-Based Parallelization: The message specifically mentions hash-based parallelization, which is a method used to optimize data processing. If the system determines that there are no objects to process based on this method, it will generate this message.
  
  
  Solution:
  
  
  Check Source Data: Verify that there are indeed changes in the source tables that need to be replicated. You can do this by checking the source database for recent updates.
  
  
  Review SLT Configuration: Ensure that the SLT configuration is correct. Check the settings for the tables being replicated, including any filters or conditions that may be applied.
  
  
  Monitor Replication Jobs: Use transaction codes like SLT_MONI to monitor the replication jobs and check for any errors or warnings that may indicate issues with the replication process.
  
  
  Adjust Parallelization Settings: If necessary, you can adjust the settings for hash-based parallelization in the SLT configuration. This may involve changing the number of parallel processes or modifying how data is partitioned for processing.
  
  
  Check Logs: Review the SLT logs for any additional error messages or warnings that may provide more context about why no objects were processed.
  
  
  Restart Replication: If you suspect that the issue is temporary, you can try restarting the replication process to see if it resolves the problem.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLT_MONI for monitoring, SLT_CONFIG for configuration, and SLT_LOG for viewing logs.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on handling this error message.
  Documentation: Refer to the official SAP documentation for SLT to understand the configuration and operational aspects better.
  
  If the issue persists after following these steps, it may be beneficial to consult with SAP support or your technical team for further investigation.