How To Fix JSON_MESSAGES_WDR004 - Index value &1 is out of valid bounds [&2, &3]

SAP Error Message - Details

• Message type: E = Error

• Message class: JSON_MESSAGES_WDR - Message class for ABAP JSON library

• Message number: 004

• Message text: Index value &1 is out of valid bounds [&2, &3]

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message JSON_MESSAGES_WDR004 - Index value &1 is out of valid bounds [&2, &3] ?

  The SAP error message JSON_MESSAGES_WDR004 with the description "Index value &1 is out of valid bounds [&2, &3]" typically indicates that there is an issue with an index being accessed in a JSON structure or array that is outside the valid range. This error often occurs in the context of Web Dynpro applications or when dealing with JSON data in SAP.
  Cause:
  
  Invalid Index Access: The error occurs when the application tries to access an element in an array or list using an index that is either negative or greater than the maximum index of the array.
  Data Mismatch: The data being processed may not match the expected structure, leading to attempts to access non-existent elements.
  Dynamic Data Changes: If the data is being modified dynamically (e.g., through user input or external data sources), the index may become invalid if the data changes after the index was calculated.
  
  Solution:
  
  Check Index Values: Review the code where the index is being calculated or accessed. Ensure that the index is within the valid range defined by the bounds provided in the error message (i.e., between &2 and &3).
  Validate Data Structure: Ensure that the JSON data structure being processed is as expected. You may want to log or debug the data to confirm its structure before accessing it.
  Error Handling: Implement error handling to catch such exceptions and provide meaningful feedback to the user or log the error for further analysis.
  Boundary Checks: Before accessing an array or list, always perform boundary checks to ensure that the index is valid.
  Debugging: Use debugging tools to step through the code and identify where the invalid index is being generated.
  
  Related Information:
  
  Web Dynpro Documentation: Review the SAP Web Dynpro documentation for best practices on handling JSON data and managing indices.
  SAP Notes: Check the SAP Support Portal for any relevant notes or patches that may address this specific error.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to prevent it from occurring in the future.