How To Fix DMC_GENERAL188 - Confirm duplicate target values

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 188

• Message text: Confirm duplicate target values

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL188 - Confirm duplicate target values ?

  The SAP error message DMC_GENERAL188 ("Confirm duplicate target values") typically occurs in the context of data management and data migration processes, particularly when using SAP Data Management tools like SAP Data Intelligence or SAP Data Services. This error indicates that there are duplicate values being attempted to be loaded into a target field that is expected to have unique values.
  Cause:
  
  Duplicate Data: The primary cause of this error is the presence of duplicate records in the source data that are being loaded into a target table or dataset that has a unique constraint on one or more fields.
  Data Model Constraints: The target table may have constraints (like primary keys or unique indexes) that prevent the insertion of duplicate values.
  Incorrect Mapping: There may be an issue with how the data is being mapped from the source to the target, leading to unintended duplicates.
  
  Solution:
  
  
  Identify Duplicates: 
  
  Review the source data to identify any duplicate records. You can use SQL queries or data profiling tools to find duplicates based on the unique fields in the target.
  
  
  
  Data Cleansing:
  
  Remove or consolidate duplicate records in the source data before attempting to load it into the target. This can involve deduplication processes or aggregating data as necessary.
  
  
  
  Adjust Target Constraints:
  
  If appropriate, consider adjusting the constraints on the target table to allow for duplicates, but this should be done with caution and understanding of the data model.
  
  
  
  Modify Data Mapping:
  
  Ensure that the data mapping is correctly set up to avoid creating duplicates. This may involve changing how data is transformed or loaded.
  
  
  
  Use Staging Tables:
  
  Load data into a staging table first, where you can perform deduplication and data validation before moving it to the final target table.
  
  
  
  Error Handling:
  
  Implement error handling in your data load process to catch and log these errors for further analysis.
  
  
  
  Related Information:
  
  Data Quality Tools: Consider using data quality tools to help identify and manage duplicates in your datasets.
  SAP Documentation: Refer to SAP's official documentation for the specific data management tool you are using for more detailed guidance on handling errors and data constraints.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the DMC_GENERAL188 error and ensure that your data loading processes run smoothly.