How To Fix APPL_PROC_HUB_PR019 - Could not connect to the back-end system &1

SAP Error Message - Details

• Message type: E = Error

• Message class: APPL_PROC_HUB_PR - Message Class for Purchase Requisition Extraction

• Message number: 019

• Message text: Could not connect to the back-end system &1

What causes this issue?

Could not connect to the back-end system <(>&<)>1

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

The restart of the job is scheduled after two hours.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message APPL_PROC_HUB_PR019 - Could not connect to the back-end system &1 ?

  The SAP error message APPL_PROC_HUB_PR019 indicates that there is a problem with connecting to the back-end system specified in the error message. This can occur in various scenarios, such as when using SAP Process Integration (PI) or when trying to access a back-end system from an SAP application.
  Causes:
  
  Network Issues: There may be network connectivity problems between the front-end and back-end systems.
  Configuration Errors: Incorrect configuration settings in the SAP system or in the middleware (like PI/PO) can lead to connection issues.
  Service Availability: The back-end system may be down or not available due to maintenance or other issues.
  Authorization Issues: The user or service account trying to connect may not have the necessary permissions to access the back-end system.
  Incorrect System Alias: The system alias used to connect to the back-end may be incorrect or not properly defined.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection to the back-end system.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the systems is stable and that there are no issues with firewalls or routing.
  Verify Configuration: Review the configuration settings in both the front-end and back-end systems. Ensure that the connection parameters (like host, port, and service) are correct.
  Check System Availability: Confirm that the back-end system is up and running. You can do this by trying to log in directly to the back-end system.
  Review Authorizations: Ensure that the user or service account has the necessary authorizations to access the back-end system.
  Validate System Alias: Check the system alias in the SAP system to ensure it points to the correct back-end system.
  Consult Logs: Look at the application logs (transaction SLG1) and system logs (transaction SM21) for more detailed error messages that can provide additional context.
  Test Connection: Use transaction SM59 to test the RFC connection to the back-end system. This can help identify if the issue is with the connection setup.
  Contact Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59: For managing RFC connections.
  SLG1: For viewing application logs.
  SM21: For checking system logs.
  
  
  Documentation: Refer to SAP Help Portal for detailed documentation on configuring connections and troubleshooting connectivity issues.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to this error message.
  
  By following these steps, you should be able to diagnose and resolve the connection issue indicated by the error message APPL_PROC_HUB_PR019.