How To Fix /IWBEP/CM_V4_COS049 - Only weak ETags are supported. '&1' is not valid.

/IWBEP/CM_V4_COS049 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_V4_COS -

• Message number: 049

• Message text: Only weak ETags are supported. '&1' is not valid.

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.

/IWBEP/CM_V4_COS049 - Details

• The SAP error message /IWBEP/CM_V4_COS049 Only weak ETags are supported. '&1' is not valid. typically occurs in the context of OData services when there is an issue with the ETag (Entity Tag) being used in HTTP requests. ETags are used for web cache validation and conditional requests, and they help in managing the state of resources.
  
  Cause:
  The error indicates that the ETag provided in the request is not a valid weak ETag. In HTTP, ETags can be strong or weak. A weak ETag is prefixed with "W/", while a strong ETag is not. The error suggests that the system is expecting a weak ETag but received something else, which could be due to:
  
  Incorrect ETag Format: The ETag provided in the request does not conform to the expected weak ETag format.
  Client-Side Issues: The client application making the request may be sending an incorrect or improperly formatted ETag.
  Server Configuration: There may be a