How To Fix PPC1DM320 - Communication error during RFC in the target system &1

SAP Error Message - Details

• Message type: E = Error

• Message class: PPC1DM - PP Backflush: Database Management and Communication

• Message number: 320

• Message text: Communication error during RFC in the target system &1

What causes this issue?

You want to compare data from the ERP System with data from the APO. To
do this, the system must read data form the APO System using an RFC. An
error occurred when the system accessed the logical destination &V1&.

System Response

The affected records cannot be compared.

How to fix this error?

Check the RFC connection between the current ERP System and the APO
destination &v1& over the following menu path:
<DS:TRAN.SM59>Tools -> Administration -> Administrative Data -> Network
-> RFC Destination</>

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPC1DM320 - Communication error during RFC in the target system &1 ?

  The SAP error message PPC1DM320, which indicates a "Communication error during RFC in the target system &1," typically arises when there is an issue with the Remote Function Call (RFC) communication between SAP systems. This can occur in various scenarios, such as during data transfer, system integration, or when executing remote function modules.
  Causes:
  
  Network Issues: Problems with the network connection between the SAP systems can lead to communication errors. This could be due to firewalls, routing issues, or network outages.
  RFC Destination Configuration: The RFC destination in the source system may not be configured correctly. This includes incorrect connection parameters, such as the target system's hostname, port, or logon credentials.
  Target System Availability: The target SAP system may be down or not reachable due to maintenance or other issues.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  SAP Kernel or Software Issues: There may be bugs or compatibility issues in the SAP kernel or software versions of the systems involved.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the two systems. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Destination:
  
  Go to transaction SM59 in the source system.
  Check the configuration of the RFC destination pointing to the target system.
  Ensure that the connection type, target host, and service number (port) are correct.
  Test the connection using the "Connection Test" option in SM59.
  
  
  Check Target System Status: Ensure that the target system is up and running. You can check the system status in the SAP GUI or through system monitoring tools.
  Review User Authorizations: Verify that the user credentials used for the RFC connection have the necessary authorizations to execute the required functions in the target system.
  Check SAP Notes: Look for any relevant SAP Notes that might address known issues with the specific versions of the SAP systems involved. You can search for notes related to RFC communication errors.
  Review Logs: Check the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that might provide more context about the issue.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SICF: HTTP Service Hierarchy
  
  
  SAP Notes: Search for SAP Notes related to RFC communication errors for specific guidance and patches.
  Documentation: Review SAP documentation on RFC and communication troubleshooting for more detailed steps and best practices.
  
  If the issue persists after following these steps, it may be necessary to involve your SAP Basis team or SAP support for further investigation.