How To Fix JO704 - Communication problem has occurred. Check RFC destination &

SAP Error Message - Details

• Message type: E = Error

• Message class: JO - Project Information System: All Overviews

• Message number: 704

• Message text: Communication problem has occurred. Check RFC destination &

What causes this issue?

The SAP System could not communicate with the external system you have
selected. The program terminated.

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

INCLUDE 'NA_ALLG_SYSTEMVERW' OBJECT DOKU ID TX LANGUAGE E
INCLUDE 'NA_ALLG_VORGEHEN' OBJECT DOKU ID TX LANGUAGE E
Check the RFC destination. Correct destinations are PS_ACCESS_1 and
PS_ACCESS_2.
Check the path to program WDAPSASTR.EXE or WDAPSATAB.EXE. The path must
be valid in order for the SAP System to communicate.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message JO704 - Communication problem has occurred. Check RFC destination & ?

  The SAP error message JO704 indicates that there is a communication problem related to the Remote Function Call (RFC) destination. This error typically arises when the system is unable to establish a connection to the specified RFC destination, which is crucial for communication between different SAP systems or between an SAP system and external systems.
  Causes of JO704 Error
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect parameters such as the target system's hostname, port, or connection type.
  
  
  Network Issues: There may be network connectivity issues preventing the SAP system from reaching the target system. This could be due to firewall settings, network outages, or incorrect routing.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  Target System Down: The target SAP system or external system may be down or not responding.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system, or there may be issues with the gateway configuration.
  
  
  Transport Layer Security (TLS) Issues: If the connection requires TLS, there may be issues with certificates or encryption settings.
  
  
  Solutions to JO704 Error
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the relevant RFC destination and check its configuration.
  Ensure that the connection type, target host, and port are correctly set.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to verify if the connection can be established.
  
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the target system is reachable from the SAP system.
  Ensure that there are no firewall rules blocking the connection.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations in the target system.
  
  
  
  Check Target System Status:
  
  Verify that the target system is up and running. Check for any system logs or alerts that may indicate issues.
  
  
  
  Review SAP Gateway Configuration:
  
  Ensure that the SAP Gateway service is running on the target system. You can check this in transaction SMGW.
  
  
  
  Check TLS/SSL Configuration:
  
  If using TLS, ensure that the certificates are correctly installed and configured on both the source and target systems.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SMGW: SAP Gateway Monitor
  SICF: HTTP Service Hierarchy
  ST22: Dump Analysis (to check for any related dumps)
  
  
  
  Logs:
  
  Check the system logs (SM21) for any additional error messages that may provide more context about the communication issue.
  
  
  
  SAP Support: If the issue persists after following the above steps, consider reaching out to SAP Support for further assistance, providing them with detailed information about the error and the steps you have already taken.
  
  
  By following these steps, you should be able to diagnose and resolve the JO704 communication problem in your SAP environment.