How To Fix DMC_DTL109 - Multiple child tables are not allowed in case of reading type 7

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_DTL - Messages for DMC data transfer layer

• Message number: 109

• Message text: Multiple child tables are not allowed in case of reading type 7

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_DTL109 - Multiple child tables are not allowed in case of reading type 7 ?

  The SAP error message DMC_DTL109 indicates that there is an issue with the data model configuration in the context of SAP Data Management or SAP Data Intelligence. Specifically, this error occurs when you attempt to read data from a source that has multiple child tables associated with a single parent table while using a reading type that does not support this configuration (in this case, reading type 7).
  Cause:
  The error is caused by the following:
  
  Multiple Child Tables: The data model you are trying to read from has more than one child table linked to a single parent table.
  Reading Type 7: This reading type is typically used for scenarios where a single parent table is expected to have a one-to-one relationship with its child tables. When multiple child tables are present, it violates the expected structure for this reading type.
  
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Change the Reading Type:
  
  If possible, switch to a different reading type that supports multiple child tables. Review the documentation for the available reading types and their capabilities.
  
  
  
  Modify the Data Model:
  
  If you have control over the data model, consider restructuring it to ensure that each parent table has only one child table. This may involve normalizing the data or creating additional parent tables.
  
  
  
  Use a Different Data Source:
  
  If the current data source is not suitable for your needs, consider using a different data source that adheres to the expected structure for reading type 7.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation related to data models and reading types to understand the limitations and best practices.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue through the above methods, consider reaching out to SAP support for assistance. They may provide insights specific to your implementation.
  
  
  
  Related Information:
  
  SAP Data Management: Understanding how data models are structured and the relationships between tables is crucial for effective data management.
  Reading Types: Familiarize yourself with the different reading types available in SAP and their specific use cases.
  Data Modeling Best Practices: Review best practices for data modeling in SAP to avoid similar issues in the future.
  
  By addressing the underlying cause of the error and implementing one of the suggested solutions, you should be able to resolve the DMC_DTL109 error and proceed with your data operations.