How To Fix R8161 - Different type definition in segment &1; DataSource &2 - DDIC &3

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 161

• Message text: Different type definition in segment &1; DataSource &2 - DDIC &3

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 R8161 - Different type definition in segment &1; DataSource &2 - DDIC &3 ?

  The SAP error message R8161 indicates that there is a mismatch in the data type definitions between the DataSource and the Data Dictionary (DDIC) for a specific segment. This typically occurs during the extraction process when the structure of the data being extracted does not match the expected structure defined in the Data Dictionary.
  Cause:
  
  Data Type Mismatch: The fields in the DataSource may have been defined with different data types or lengths compared to the corresponding fields in the DDIC.
  Changes in DataSource: If the DataSource has been modified (e.g., fields added, removed, or changed) after the initial setup, it may lead to inconsistencies.
  Custom Modifications: If there are custom modifications or enhancements in the DataSource or the underlying tables, this can also lead to discrepancies.
  Transport Issues: If the DataSource was transported from one system to another, there may be inconsistencies in the definitions between the source and target systems.
  
  Solution:
  
  
  Check DataSource and DDIC Definitions: 
  
  Go to the DataSource in the SAP system and check the field definitions (data types, lengths, etc.).
  Compare these definitions with the corresponding fields in the Data Dictionary (DDIC) to identify any discrepancies.
  
  
  
  Adjust DataSource or DDIC:
  
  If the DataSource is incorrect, you may need to adjust the field definitions in the DataSource to match the DDIC.
  Conversely, if the DDIC is outdated or incorrect, you may need to update the DDIC definitions to align with the DataSource.
  
  
  
  Re-activate DataSource: 
  
  After making changes, re-activate the DataSource to ensure that the changes take effect.
  
  
  
  Check for Enhancements: 
  
  If there are any enhancements or custom fields, ensure that they are correctly defined and do not conflict with existing definitions.
  
  
  
  Testing: 
  
  After making the necessary adjustments, perform a test extraction to ensure that the error is resolved.
  
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSA1 (Data Warehousing Workbench) to manage DataSources and check their definitions.
  DataSource Maintenance: Use transaction RSDS to maintain DataSources and check their structure.
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to this error message.
  Documentation: Review SAP documentation for guidelines on DataSource and DDIC management to ensure best practices are followed.
  
  By following these steps, you should be able to resolve the R8161 error and ensure that your DataSource and DDIC definitions are consistent.