How To Fix DDLS299 - DDL source &: parse_cds returned initial AST and no errors

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 299

• Message text: DDL source &: parse_cds returned initial AST and no errors

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 DDLS299 - DDL source &: parse_cds returned initial AST and no errors ?

  The SAP error message DDLS299 with the description "DDL source &: parse_cds returned initial AST and no errors" typically occurs in the context of Core Data Services (CDS) views or when working with Data Definition Language (DDL) in SAP systems. This message indicates that the parser for the CDS definition returned an initial Abstract Syntax Tree (AST) without any errors, which suggests that the parser did not find any syntactical issues, but it also did not produce a valid AST for further processing.
  Cause
  The error can be caused by several factors:
  
  Empty or Invalid CDS Definition: The CDS view or DDL source might be empty or not properly defined, leading to an initial AST being returned.
  Syntax Issues: While the parser did not find syntax errors, there might be logical issues or unsupported constructs in the CDS definition.
  Incompatibility: The CDS definition might be using features or syntax that are not supported in the current version of the SAP system.
  Missing Annotations or Elements: Required annotations or elements might be missing from the CDS definition.
  
  Solution
  To resolve the DDLS299 error, consider the following steps:
  
  
  Check the CDS Definition: Review the CDS view or DDL source for completeness. Ensure that all required elements, such as fields, annotations, and associations, are properly defined.
  
  
  Validate Syntax: Even if no syntax errors are reported, validate the logic and structure of the CDS definition. Ensure that it adheres to the expected syntax and semantics for CDS views.
  
  
  Use the ABAP Development Tools (ADT): If you are using ADT in Eclipse, use the built-in validation tools to check for issues in the CDS definition. This can help identify logical errors that may not be caught by the parser.
  
  
  Check for Compatibility: Ensure that the features used in the CDS definition are supported by the version of the SAP system you are working with. Refer to the SAP documentation for the specific version to verify compatibility.
  
  
  Review Annotations: Ensure that all necessary annotations are included in the CDS definition. Missing annotations can lead to issues in the generation of the AST.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or updates that might address this specific error or provide guidance on similar issues.
  
  
  Debugging: If the issue persists, consider debugging the CDS view or using transaction codes like SE11 or SE80 to analyze the underlying data model and dependencies.
  
  
  Related Information
  
  SAP Documentation: Refer to the official SAP documentation for Core Data Services and DDL to understand the expected structure and syntax.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and to share solutions.
  SAP Notes: Regularly check for SAP Notes related to CDS and DDL errors, as they may provide specific fixes or workarounds.
  
  By following these steps, you should be able to identify and resolve the underlying issue causing the DDLS299 error in your SAP environment.