How To Fix SADT_REST111 - Expected header: &3 but was: &2 (Line: &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: SADT_REST - Messages for ADT REST Framework

• Message number: 111

• Message text: Expected header: &3 but was: &2 (Line: &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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SADT_REST111 - Expected header: &3 but was: &2 (Line: &1) ?

  The SAP error message SADT_REST111 indicates that there is a mismatch in the expected HTTP header during a REST API call. The message format is as follows:
  
  Expected header: This is the header that the system anticipated receiving.
  But was: This indicates the actual header that was received.
  Line: This typically refers to the line number in the code or configuration where the error occurred.
  
  Cause
  The error usually arises due to one of the following reasons:
  
  Incorrect API Call: The client making the API call may not be sending the correct headers as specified in the API documentation.
  Configuration Issues: There may be a misconfiguration in the SAP system or the API service that is causing it to expect a different header.
  Version Mismatch: If there are multiple versions of the API, the client may be using an outdated version that does not match the expected headers of the current API.
  Network Issues: Sometimes, network intermediaries (like proxies or firewalls) can alter HTTP headers, leading to unexpected values.
  
  Solution
  To resolve the SADT_REST111 error, you can take the following steps:
  
  
  Check API Documentation: Review the API documentation to ensure that you are sending the correct headers. Pay special attention to required headers and their expected values.
  
  
  Inspect the API Call: Use tools like Postman or cURL to manually test the API call and verify that the headers are being sent correctly.
  
  
  Debugging: If you have access to the SAP system logs, check for any additional error messages or logs that might provide more context about the issue.
  
  
  Update Client Code: If you find that the client code is sending incorrect headers, update it to match the expected values.
  
  
  Check Configuration: Ensure that the SAP system is correctly configured to handle the API requests. This includes checking any middleware or integration settings.
  
  
  Version Compatibility: If you suspect a version mismatch, ensure that both the client and server are using compatible versions of the API.
  
  
  Network Analysis: If you suspect network issues, use tools like Wireshark to analyze the HTTP traffic and see if any intermediaries are modifying the headers.
  
  
  Related Information
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific API you are working with.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues faced by other users.
  API Versioning: Always keep track of the API version you are using, as changes in newer versions may introduce new required headers or deprecate old ones.
  
  By following these steps, you should be able to identify the cause of the SADT_REST111 error and implement a solution to resolve it.