How To Fix /IWBEP/CM_MGW_RT091 - Caching on hub not allowed by configuration (Softstate or Service Config)

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 091

• Message text: Caching on hub not allowed by configuration (Softstate or Service Config)

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 /IWBEP/CM_MGW_RT091 - Caching on hub not allowed by configuration (Softstate or Service Config) ?

  The SAP error message /IWBEP/CM_MGW_RT091 indicates that caching is not allowed on the hub due to the current configuration settings. This error typically arises in the context of SAP Gateway and OData services, particularly when dealing with the configuration of caching mechanisms.
  Cause:
  
  Configuration Settings: The error is primarily caused by the configuration settings of the OData service or the SAP Gateway. If the service is set to "Softstate" or if the service configuration does not allow caching, this error will be triggered.
  Service Definition: The OData service might be defined in such a way that it does not support caching, either due to the nature of the data being served or specific settings in the service definition.
  Hub vs. Backend: In a hub deployment scenario, caching might be restricted to ensure data consistency and integrity, especially if the backend system is frequently updated.
  
  Solution:
  
  
  Check Service Configuration:
  
  Go to the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  Check the configuration of the OData service in question. Ensure that the caching settings are correctly configured.
  If caching is required, you may need to adjust the service settings to allow caching.
  
  
  
  Adjust Softstate Settings:
  
  If the service is set to "Softstate", consider changing it to "Hardstate" if appropriate for your use case. This can be done in the service configuration settings.
  Review the implications of changing the state from Softstate to Hardstate, as it may affect how data is retrieved and cached.
  
  
  
  Review Gateway and Backend Settings:
  
  Ensure that both the SAP Gateway and the backend system are configured to support caching if that is the desired behavior.
  Check for any specific notes or guidelines from SAP regarding caching configurations for your version of the SAP Gateway.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes that might address this specific error or provide guidance on caching configurations. You can search for notes in the SAP Support Portal.
  
  
  
  Testing:
  
  After making changes, test the OData service to ensure that the error is resolved and that caching behaves as expected.
  
  
  
  Related Information:
  
  SAP Gateway: The SAP Gateway is a technology that allows you to connect devices, environments, and applications to SAP systems. It enables the creation of OData services.
  OData Services: OData (Open Data Protocol) is a standard protocol for creating and consuming data APIs. Understanding how OData services work in SAP can help in troubleshooting issues related to them.
  Caching Mechanisms: Caching is a performance optimization technique that stores copies of files or data in a cache, so future requests for that data can be served faster. In SAP, caching can be configured at various levels, including the application layer and the database layer.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance.