How To Fix /IWBEP/CM_V4_RUNTIME049 - If-Unmodified-Since has not been processed

/IWBEP/CM_V4_RUNTIME049 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_V4_RUNTIME -

• Message number: 049

• Message text: If-Unmodified-Since has not been processed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_RUNTIME049 - If-Unmodified-Since has not been processed ?

  The SAP error message /IWBEP/CM_V4_RUNTIME049 If-Unmodified-Since has not been processed typically occurs in the context of OData services when there is an issue with the handling of the If-Unmodified-Since HTTP header. This header is used in HTTP requests to ensure that the resource being modified has not been changed since the specified date and time. If the resource has been modified, the server should reject the request.
  
  Cause:
  
  
  Missing or Incorrect Implementation: The OData service may not be correctly implemented to handle the If-Unmodified-Since header. This could be due to missing logic in the service that checks the timestamp against the last modified date of the resource.
  
  
  Resource Not Found: The resource being accessed may not exist, leading to the inability to check the modification date.
  
  
  Service Configuration: The OData service might not be configured to support optimistic concurrency control, which is what the If-Unmodified-Since header is part of.
  
  
  Incorrect Header Value: The value provided