How To Fix /UI2/FND400 - Request cannot be fulfilled due to bad syntax

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/FND -

• Message number: 400

• Message text: Request cannot be fulfilled due to bad syntax

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 /UI2/FND400 - Request cannot be fulfilled due to bad syntax ?

  The SAP error message /UI2/FND400 Request cannot be fulfilled due to bad syntax typically occurs in the context of SAP Fiori applications or when using the SAP Gateway. This error indicates that there is an issue with the syntax of the request being sent to the server, which prevents the server from processing it correctly.
  Causes:
  
  Malformed URL: The request URL may contain invalid characters or incorrect formatting.
  Incorrect Query Parameters: The parameters being sent in the request may not conform to the expected format or may be missing required parameters.
  Invalid Data Types: The data types of the parameters may not match what the backend service expects.
  Issues with OData Services: If the request is targeting an OData service, there may be issues with the service definition or the way it is being called.
  Browser Extensions: Sometimes, browser extensions can interfere with the request being sent.
  
  Solutions:
  
  Check the URL: Ensure that the URL being used in the request is correctly formatted and does not contain any invalid characters.
  Validate Query Parameters: Review the query parameters being sent in the request. Make sure they are correctly formatted and all required parameters are included.
  Review Data Types: Ensure that the data types of the parameters match what the backend service expects. For example, if a parameter expects an integer, make sure you are not sending a string.
  Test OData Service: Use tools like SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service directly. This can help identify if the issue is with the service itself or the way it is being called.
  Check for Browser Issues: Try clearing the browser cache or disabling any browser extensions that might be interfering with the request.
  Review Fiori Configuration: If you are using Fiori, check the configuration settings in the Fiori Launchpad and ensure that the application is set up correctly.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues faced by other users and potential solutions.
  Debugging: If you have access to the backend, consider enabling debugging to get more detailed information about the request and where it is failing.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis or development team for further investigation.