How To Fix /UI5/MP_CP_APP008 - Only a single dataSource is permitted or an OData with ODataAnnotations

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI5/MP_CP_APP -

• Message number: 008

• Message text: Only a single dataSource is permitted or an OData with ODataAnnotations

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI5/MP_CP_APP008 - Only a single dataSource is permitted or an OData with ODataAnnotations ?

  The SAP error message /UI5/MP_CP_APP008 indicates that there is an issue with the configuration of your SAPUI5 application, specifically related to the data sources defined in your application. This error typically arises when the application is trying to use multiple data sources in a context where only one is allowed, or when the OData service being used does not have the required annotations.
  Cause:
  
  
  Multiple Data Sources: The application is configured to use more than one data source in a context where only a single data source is permitted. This can happen if you have defined multiple OData models in your manifest or component file.
  
  
  Missing OData Annotations: If you are using an OData service, it may not have the necessary annotations that are required for the application to function correctly. Annotations provide metadata about the data model and are essential for UI5 applications to understand how to interact with the data.
  
  
  Solution:
  
  
  Check Data Source Configuration:
  
  Open your manifest.json file (or the component file) and review the sap.app section.
  Ensure that you have only one data source defined for the relevant view or component. If you need to use multiple data sources, consider restructuring your application to handle them appropriately.
  
  
  
  Use OData with Annotations:
  
  If you are using an OData service, ensure that it is properly annotated. You can check the service in the SAP Gateway Service Builder (transaction code: SEGW) to see if annotations are defined.
  If annotations are missing, you may need to create or enhance the OData service to include the necessary annotations. This can involve defining metadata in the service or using an annotation file.
  
  
  
  Review the Application Logic:
  
  Ensure that your application logic does not inadvertently attempt to bind multiple models to a single control or view that expects only one data source.
  
  
  
  Debugging:
  
  Use the browser's developer tools to check for any additional error messages or warnings in the console that might provide more context about the issue.
  Check the network tab to see if the OData service is being called correctly and if the response includes the expected annotations.
  
  
  
  Related Information:
  
  SAPUI5 Documentation: Refer to the official SAPUI5 documentation for guidelines on configuring data sources and using OData services.
  OData Annotations: Familiarize yourself with OData annotations and how they can be defined in your service to enhance the metadata provided to the UI5 application.
  SAP Community: Engage with the SAP Community forums to find similar issues faced by other developers and potential solutions.
  
  By following these steps, you should be able to resolve the /UI5/MP_CP_APP008 error and ensure that your SAPUI5 application is correctly configured to use the appropriate data sources.