How To Fix SOS_MAPPING850 - The TYPE field exists more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: SOS_MAPPING - Object Services: Persistence Mapping for Messages

• Message number: 850

• Message text: The TYPE field exists more than once

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 SOS_MAPPING850 - The TYPE field exists more than once ?

  The SAP error message SOS_MAPPING850, which states "The TYPE field exists more than once," typically occurs in the context of data mapping or transformation processes, particularly when working with SAP Data Services or similar tools. This error indicates that there are multiple occurrences of a field named "TYPE" in the data structure being processed, which leads to ambiguity in the mapping or transformation logic.
  Cause:
  
  Duplicate Field Names: The most common cause is that the source or target data structure has multiple fields with the same name "TYPE." This can happen if the data source schema is not well-defined or if there are multiple tables or views being joined that contain a field with the same name.
  Incorrect Mapping Configuration: If you are using a mapping tool, the configuration might have been set up incorrectly, leading to the same field being referenced multiple times.
  Data Model Issues: The underlying data model may have been designed in a way that leads to naming conflicts, especially in complex data transformations or when integrating multiple data sources.
  
  Solution:
  
  Identify Duplicates: Review the data structure (source and target) to identify where the duplicate "TYPE" fields are located. This can often be done by examining the schema or metadata of the involved tables or views.
  Rename Fields: If possible, rename one of the "TYPE" fields in the source or target structure to avoid the conflict. This can be done in the data source or during the mapping process.
  Adjust Mapping Logic: Modify the mapping logic to ensure that only one instance of the "TYPE" field is being referenced. This may involve changing the way data is joined or transformed.
  Use Aliases: If you are working with SQL queries or data transformation scripts, consider using aliases to differentiate between the fields. For example, you can use SELECT table1.TYPE AS TYPE1, table2.TYPE AS TYPE2 to avoid conflicts.
  Consult Documentation: If you are using a specific SAP tool (like SAP Data Services), refer to the official documentation for guidance on handling field name conflicts.
  
  Related Information:
  
  SAP Data Services: If you are using SAP Data Services, familiarize yourself with its data flow and mapping capabilities, as well as best practices for naming conventions.
  Data Modeling Best Practices: Ensure that your data model adheres to best practices, such as avoiding ambiguous field names and maintaining clear naming conventions.
  Debugging Tools: Utilize debugging tools within SAP to trace the data flow and identify where the conflict arises.
  
  By addressing the root cause of the duplicate field names and adjusting your mapping or data structure accordingly, you should be able to resolve the SOS_MAPPING850 error.