How To Fix JSON_MESSAGES_WDR003 - Parsing of JSON string failed due to an illegal value type (&1)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 003

• Message text: Parsing of JSON string failed due to an illegal value type (&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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message JSON_MESSAGES_WDR003 - Parsing of JSON string failed due to an illegal value type (&1) ?

  The SAP error message JSON_MESSAGES_WDR003 indicates that there was a failure in parsing a JSON string due to an illegal value type. This typically occurs when the JSON data being processed contains a value that is not valid according to the JSON specification or the expected data types defined in the SAP application.
  Cause
  The error can be caused by several factors, including:
  
  Invalid Data Types: The JSON string may contain values that are not of the expected type (e.g., a string where a number is expected).
  Malformed JSON: The JSON structure may be incorrectly formatted, such as missing quotes, brackets, or commas.
  Unsupported Data Types: The JSON may include data types that are not supported by the SAP system, such as functions or complex objects.
  Special Characters: The presence of special characters that are not properly escaped can lead to parsing errors.
  
  Solution
  To resolve the JSON_MESSAGES_WDR003 error, you can take the following steps:
  
  
  Validate JSON Structure: Use a JSON validator tool to check the structure of your JSON string. Ensure that it adheres to the JSON format and that all keys and values are correctly formatted.
  
  
  Check Data Types: Review the expected data types for each field in the JSON. Ensure that the values provided match the expected types (e.g., strings should be enclosed in quotes, numbers should not have quotes).
  
  
  Escape Special Characters: If your JSON contains special characters (like quotes, backslashes, etc.), make sure they are properly escaped.
  
  
  Debugging: If you have access to the code that generates the JSON, add logging to output the JSON string before it is sent for parsing. This can help you identify the exact content that is causing the issue.
  
  
  Review Documentation: Check the SAP documentation for any specific requirements or limitations regarding JSON data handling in the context you are working with.
  
  
  Test with Simplified Data: If possible, simplify the JSON data to a minimal version that you know should work, and gradually add back complexity to identify the specific part that causes the error.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes for any known issues or patches related to JSON parsing in your specific version of SAP.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found.
  JSON Specification: Familiarize yourself with the JSON specification (RFC 8259) to understand valid data types and structures.
  
  By following these steps, you should be able to identify and resolve the cause of the JSON_MESSAGES_WDR003 error in your SAP application.