How To Fix XS821 - Cannot process message in node, parameters cannot be converted

SAP Error Message - Details

• Message type: E = Error

• Message class: XS - SAPconnect: All messages

• Message number: 821

• Message text: Cannot process message in node, parameters cannot be converted

What causes this issue?

The message cannot be processed in the node as parameters such as 'Send
time' or 'Priority' cannot be converted. It is possible that entire
parameters such as 'Recipient list' or 'Packet list' are missing.

System Response

Processing was terminated.
SAP system additional information (error number, if available):
&V2&
Additional information of the node used (in the system language of the
node):
&V4&

How to fix this error?

Notify your system administrator. If a trace exists for the node, use it
to find out which parameters are missing. Modify the message accordingly
(for example, by changing the send class). You may need to notify the
manufacturer of node &V1& or the SAP Hotline.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message XS821 - Cannot process message in node, parameters cannot be converted ?

  The SAP error message XS821, which states "Cannot process message in node, parameters cannot be converted," typically indicates an issue with data type conversion or parameter handling in an SAP system, particularly in the context of SAP HANA or XS (Extended Services) applications. This error can occur when the system is unable to convert the parameters passed to a function or service into the expected data types.
  Causes:
  
  Data Type Mismatch: The parameters being passed to a function or service do not match the expected data types. For example, trying to pass a string where a number is expected.
  Invalid Input Values: The input values may not conform to the expected format or range, leading to conversion failures.
  Configuration Issues: There may be misconfigurations in the XS application or service that lead to incorrect parameter handling.
  Coding Errors: There could be bugs in the application code that lead to improper handling of parameters.
  
  Solutions:
  
  Check Parameter Types: Review the function or service definition to ensure that the parameters being passed match the expected data types. Make sure that the data types are compatible.
  Validate Input Values: Ensure that the input values being sent to the service are valid and conform to the expected formats. Implement input validation to catch issues before they cause errors.
  Debugging: Use debugging tools to trace the execution of the code and identify where the conversion is failing. Look for any logs or error messages that provide more context.
  Review Code: If you have access to the source code, review it for any potential bugs or logical errors that could lead to this issue. Pay special attention to any type casting or conversion logic.
  Consult Documentation: Refer to the SAP documentation for the specific function or service you are using to ensure that you are using it correctly.
  Update or Patch: If this is a known issue, check if there are any updates or patches available for your SAP system that address this error.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to this error message. SAP Notes often provide solutions or workarounds for specific error messages.
  Community Forums: Engage with the SAP community forums or support channels to see if others have encountered and resolved similar issues.
  Testing Environment: If possible, replicate the issue in a testing environment to experiment with different inputs and configurations without affecting production systems.
  
  By following these steps, you should be able to identify the root cause of the XS821 error and implement a suitable solution.