How To Fix RSAR156 - Wrong Data Type

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAR - Data Transfer and Metadata Maintenance

• Message number: 156

• Message text: Wrong Data Type

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 RSAR156 - Wrong Data Type ?

  The SAP error message RSAR156 "Wrong Data Type" typically occurs in the context of data transfer processes, particularly when dealing with data extraction and loading in SAP BW (Business Warehouse) or SAP Data Services. This error indicates that there is a mismatch between the expected data type of a field and the actual data type being provided.
  Causes:
  
  Data Type Mismatch: The most common cause is that the data type defined in the target (e.g., InfoObject, DataStore Object) does not match the data type of the source data being extracted.
  Incorrect Mapping: If the mapping between source and target fields is not correctly defined, it can lead to this error.
  Data Format Issues: Sometimes, the format of the data being transferred (e.g., date formats, numeric formats) does not conform to the expected format in the target system.
  Changes in Data Model: If there have been recent changes to the data model (e.g., changes in InfoObjects or DataStore Objects), it may lead to inconsistencies.
  
  Solutions:
  
  Check Data Types: Verify the data types of the source and target fields. Ensure that they match. For example, if the target field is defined as a numeric type, the source field should also be numeric.
  Adjust Mapping: Review the mapping configuration in the data transfer process. Ensure that the fields are correctly mapped and that the data types align.
  Data Transformation: If necessary, apply transformations to convert the data into the correct format before loading it into the target. This can be done using transformation rules in the data flow.
  Review Data Model Changes: If there have been changes to the data model, ensure that all relevant objects are updated and that the data transfer processes are aligned with the new definitions.
  Test with Sample Data: Run tests with sample data to identify specific records that may be causing the issue. This can help isolate the problem.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like RSA1 (Data Warehousing Workbench) to check the data flow and mappings.
  Logs and Traces: Check the logs for more detailed error messages that can provide additional context about the issue.
  SAP Notes: Look for relevant SAP Notes that may address this specific error or provide guidance on similar issues.
  Documentation: Refer to SAP documentation for data transfer processes and data modeling best practices to ensure compliance with expected configurations.
  
  By following these steps, you should be able to identify and resolve the RSAR156 error effectively.