How To Fix ESH_CHECK_CONN056 - Connector &1 (CDS) has no data

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_CHECK_CONN - Check connector consistency

• Message number: 056

• Message text: Connector &1 (CDS) has no data

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 ESH_CHECK_CONN056 - Connector &1 (CDS) has no data ?

  The SAP error message ESH_CHECK_CONN056 indicates that the specified connector (in this case, a CDS - Core Data Services connector) does not have any data available. This can occur in various scenarios, particularly when working with SAP Enterprise Search or SAP HANA.
  Causes:
  
  No Data in the Source: The most straightforward reason is that the underlying data source does not contain any data that matches the criteria defined for the connector.
  Incorrect Configuration: The connector may not be configured correctly, leading to it not being able to access or retrieve data.
  Authorization Issues: The user or service account may not have the necessary permissions to access the data in the source system.
  Data Model Issues: There may be issues with the data model or the way the data is being exposed through the CDS view.
  Indexing Issues: If the data is supposed to be indexed for search purposes, there may be issues with the indexing process that prevent data from being available.
  Filters Applied: If there are filters applied to the search or query, they may be too restrictive, resulting in no data being returned.
  
  Solutions:
  
  Check Data Availability: Verify that the underlying data source actually contains data. You can do this by querying the data source directly.
  Review Connector Configuration: Ensure that the connector is configured correctly. Check the settings in the SAP system to ensure that the connection parameters are correct.
  Check Authorizations: Make sure that the user or service account has the necessary authorizations to access the data. You may need to adjust roles or permissions.
  Validate Data Model: Review the CDS view definition to ensure that it is correctly defined and that it exposes the necessary data.
  Re-index Data: If the data is supposed to be indexed, consider re-indexing the data to ensure that it is available for search.
  Adjust Filters: If filters are being applied, review them to ensure they are not too restrictive. You may need to modify or remove filters to retrieve data.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the specific error message for any known issues or patches.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found.
  Documentation: Review the official SAP documentation for Enterprise Search and CDS views for best practices and troubleshooting steps.
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary) to check the CDS view definition and SE80 (Object Navigator) to explore the related objects.
  
  By following these steps, you should be able to diagnose and resolve the issue related to the ESH_CHECK_CONN056 error message.