How To Fix FDT_CP_MSG177 - Invalid AST node with Id &1

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CP_MSG -

• Message number: 177

• Message text: Invalid AST node with Id &1

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 FDT_CP_MSG177 - Invalid AST node with Id &1 ?

  The SAP error message FDT_CP_MSG177: Invalid AST node with Id &1 typically occurs in the context of the SAP Fiori or SAP UI5 applications, particularly when dealing with the Fiori Design Time (FDT) framework. This error indicates that there is an issue with the Abstract Syntax Tree (AST) node, which is a representation of the structure of the application or UI component.
  Cause:
  
  Corrupted or Incomplete Configuration: The AST node may be corrupted or not properly defined in the application configuration.
  Version Mismatch: There may be a mismatch between the versions of the components being used, leading to incompatibility.
  Missing Dependencies: Required libraries or dependencies may not be loaded or available, causing the AST to fail during processing.
  Custom Code Issues: If there are custom modifications or extensions in the application, they may not be correctly implemented, leading to invalid AST nodes.
  
  Solution:
  
  Check Configuration: Review the configuration settings of the application to ensure that all nodes are correctly defined and that there are no missing or corrupted entries.
  Update Components: Ensure that all components and libraries are up to date and compatible with each other. This may involve updating the SAP Fiori elements or UI5 libraries.
  Clear Cache: Clear the browser cache and the SAP Gateway cache to ensure that no stale data is causing the issue.
  Debugging: Use debugging tools to trace the execution and identify where the AST node is failing. This can help pinpoint the exact cause of the error.
  Review Custom Code: If there are custom implementations, review the code for any errors or inconsistencies that may lead to invalid AST nodes.
  Consult Documentation: Refer to the SAP documentation for Fiori and UI5 for any specific guidelines or troubleshooting steps related to AST nodes.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues. They may provide insights or solutions that worked for them.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it is affecting production systems.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the FDT_CP_MSG177 error in your SAP environment.