How To Fix 1R557 - Content-Type &1 is not permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: 1R - SAP Knowledge Provider

• Message number: 557

• Message text: Content-Type &1 is not permitted

What causes this issue?

The Content-Type &V1& was specified when document components were
saved. This Content-Type is not permitted.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 1R557 - Content-Type &1 is not permitted ?

  The SAP error message 1R557 indicates that the Content-Type specified in a request is not permitted. This error typically occurs in the context of SAP Gateway or OData services when the Content-Type header in an HTTP request does not match the expected values defined in the service.
  Cause:
  
  Invalid Content-Type: The Content-Type specified in the request header is not recognized or allowed by the SAP system. Common Content-Types include application/json, application/xml, etc.
  Configuration Issues: The OData service or the Gateway configuration may not be set up to accept the specified Content-Type.
  Client-Side Issues: The client application making the request may be incorrectly setting the Content-Type header.
  
  Solution:
  
  
  Check the Request: Ensure that the Content-Type header in your HTTP request matches one of the allowed types for the OData service you are trying to access. For example, if the service expects application/json, make sure that is what you are sending.
  
  
  Review Service Metadata: Access the service metadata (usually available at the service URL with $metadata appended) to see the expected Content-Types for requests and responses.
  
  
  Adjust Client Configuration: If you are using a client application (like Postman, a custom application, etc.), ensure that it is configured to send the correct Content-Type.
  
  
  Check Gateway Configuration: If you have access to the SAP Gateway configuration, verify that the service is configured to accept the Content-Type you are trying to use. This may involve checking the service definition in transaction /IWFND/MAINT_SERVICE.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific OData service you are using to understand the expected Content-Types and any other requirements.
  
  
  Error Logs: Check the SAP Gateway error logs (transaction /IWFND/ERROR_LOG) for more details on the error and any related issues.
  
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP can help in troubleshooting issues related to Content-Type.
  HTTP Protocol: Familiarity with HTTP headers and how they are used in requests can provide insights into resolving Content-Type issues.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to this error message.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.