How To Fix CNV_IUUC_REPLICATION329 - Error while establishing RFC connection to the target system

CNV_IUUC_REPLICATION329 - Overview

• Message type: E = Error

• Message class: CNV_IUUC_REPLICATION - IUUC replication messages (HANA)

• Message number: 329

• Message text: Error while establishing RFC connection to the target system

An error occurred while trying to establish the RFC connection to the
target system. Possible reasons for this include:
The RFC destination does not exist.
The user name or password is incorrect.
The user is locked in the target system.
The user has expired.
The target system is not responding, or is down.
An invalid host name was entered .

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.

CNV_IUUC_REPLICATION329 - Details

• The SAP error message CNV_IUUC_REPLICATION329 typically indicates an issue with establishing a Remote Function Call (RFC) connection to the target system during data replication processes, often related to the SAP Landscape Transformation (SLT) replication setup. Here are the potential causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the source and target systems.
  RFC Destination Configuration: The RFC destination may not be correctly configured in the source system.
  Authorization Issues: The user credentials used for the RFC connection may lack the necessary authorizations.
  Target System Availability: The target system may be down or not reachable.
  Incorrect Parameters: The parameters used in the RFC connection might be incorrect or incomplete.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the source system can reach the target system.
  Ensure that there are no network outages or issues.
  
  
  
  Verify RFC Destination:
  
  Go