How To Fix C_300 - Mass data handling is not allowed in combination with complex structures

SAP Error Message - Details

• Message type: E = Error

• Message class: C_ - CRM Integration Messages

• Message number: 300

• Message text: Mass data handling is not allowed in combination with complex structures

What causes this issue?

You can use complex structures during data transfer when processing
object &V1& (object class &V2&). Mass data handling should
not be activated for this object.
If the object class is masked (' * '), none of the objects in this
object class should have usage of complex structures activated.

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?

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 C_300 - Mass data handling is not allowed in combination with complex structures ?

  The SAP error message C_300, which states "Mass data handling is not allowed in combination with complex structures," typically occurs when you are trying to perform mass data operations (like mass uploads or updates) on data structures that are considered complex. This can happen in various contexts, such as when using transaction codes for mass changes or uploads, or when working with certain data models that involve nested or hierarchical structures.
  Cause:
  
  Complex Structures: The error arises because the data structure you are trying to manipulate is complex, meaning it may involve multiple levels of data or relationships that cannot be handled in a single mass operation.
  Transaction Limitations: Certain SAP transactions or programs are designed to handle simple flat structures and do not support complex data types or relationships.
  Data Integrity: SAP enforces this restriction to maintain data integrity and ensure that complex relationships are correctly managed.
  
  Solution:
  
  Break Down the Data: Instead of trying to process all the data at once, break it down into smaller, simpler batches that can be handled individually. This may involve processing each level of the structure separately.
  Use Appropriate Tools: Consider using tools or transactions that are specifically designed to handle complex structures. For example, using BAPIs (Business Application Programming Interfaces) or custom ABAP programs that can manage the complexity of the data.
  Check Configuration: Review the configuration of the data model you are working with. Ensure that it is set up correctly and that you are using the right methods for data manipulation.
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction or data structure you are working with. There may be specific guidelines or best practices for handling complex data.
  Seek Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide guidance based on your specific scenario.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context on handling complex structures.
  Transaction Codes: Familiarize yourself with the transaction codes you are using and their limitations regarding data handling.
  Data Model: Understand the data model you are working with, including any relationships and dependencies that may affect how data can be processed.
  
  By following these steps, you should be able to address the C_300 error and successfully manage your data operations in SAP.