How To Fix DDLS166 - Currently, only unmanaged associations are supported

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 166

• Message text: Currently, only unmanaged associations are supported

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 DDLS166 - Currently, only unmanaged associations are supported ?

  The SAP error message DDLS166 ("Currently, only unmanaged associations are supported") typically occurs in the context of Data Definition Language (DDL) operations, particularly when working with Core Data Services (CDS) views or when trying to define associations in a way that is not supported by the system.
  Cause:
  The error arises when you attempt to create or use managed associations in a context where only unmanaged associations are allowed. Managed associations are those that are automatically handled by the framework, while unmanaged associations require manual handling of the relationships between entities.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Association Definition: Review the definition of your associations in the CDS view or the data model. Ensure that you are using unmanaged associations if the context requires it.
  
  
  Change Association Type: If you are currently using managed associations, consider changing them to unmanaged associations. This typically involves defining the association without the automatic handling features.
  
  
  Review Documentation: Consult the SAP documentation for the specific version you are using to understand the limitations and requirements for associations in CDS views.
  
  
  Update SAP System: If you are using an older version of SAP, consider updating to a newer version where more features and support for managed associations may be available.
  
  
  Check for Compatibility: Ensure that the components you are working with (e.g., database, application server) are compatible with the features you are trying to use.
  
  
  Consult SAP Notes: Look for any relevant SAP Notes that might address this issue or provide additional guidance.
  
  
  Related Information:
  
  
  Unmanaged Associations: These are associations that do not rely on the framework for lifecycle management. You need to handle the relationships manually in your application logic.
  
  
  Managed Associations: These are associations that are automatically managed by the framework, which can simplify development but may not be supported in all contexts.
  
  
  CDS Views: Core Data Services (CDS) are a way to define semantic data models in SAP. Understanding how to properly define associations in CDS views is crucial for avoiding this error.
  
  
  SAP Community and Forums: Engaging with the SAP community through forums can provide insights and solutions from other users who may have encountered similar issues.
  
  
  By following these steps and understanding the context of the error, you should be able to resolve the DDLS166 error effectively.