How To Fix DU203 - Error occurred in CPIC & communication

SAP Error Message - Details

• Message type: E = Error

• Message class: DU - Data transfer to SAP-EIS

• Message number: 203

• Message text: Error occurred in CPIC & communication

What causes this issue?

An error occurred during CPIC communication with another system.

System Response

Communication was terminated with internal error code &v2&.

How to fix this error?

Check the SAP-EIS transfer log.
Check the system log and dump analysis in the target system.
Check the gateway system log.
If the system log does not indicate the cause of the error, you can
trace CPIC communication in the R/2 system using transaction 'TRAC'.
A higher trace level can be set at network level for the gateway. The
parameter is rdisp/trace = 2.
Possible errors are:
The transfer structure (sender program) has not been correctly
maintained and generated.
The transfer rules have not been maintained.
The sideinfo table has not been maintained (see Basis manual SAP
Communication).
The user in the target system under whose name the system is logged on
is not authorized for CPIC or is not in the correct client.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DU203 - Error occurred in CPIC & communication ?

  The SAP error message DU203 indicates that there is a problem with the communication between the SAP system and an external system or service, typically related to the CPIC (Common Programming Interface for Communication) layer. This error can occur due to various reasons, including network issues, configuration problems, or issues with the external system itself.
  Causes of DU203 Error
  
  Network Issues: Problems with the network connection between the SAP system and the external system can lead to communication failures.
  Configuration Errors: Incorrect settings in the SAP system or the external system can cause communication issues. This includes incorrect RFC (Remote Function Call) destination settings.
  Firewall Restrictions: Firewalls may block the necessary ports for communication between systems.
  External System Down: The external system that SAP is trying to communicate with may be down or experiencing issues.
  SAP Kernel Issues: Sometimes, issues with the SAP kernel or outdated components can lead to communication errors.
  User Authorization: Lack of proper authorization for the user trying to establish the connection can also result in this error.
  
  Solutions to DU203 Error
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the external system is stable and functioning. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Destination: Go to transaction code SM59 in SAP and check the configuration of the RFC destination. Ensure that the settings (such as target host, system number, and client) are correct.
  Check Firewall Settings: Ensure that the necessary ports are open in the firewall settings to allow communication between the systems.
  Test Connection: In transaction SM59, you can test the RFC connection to see if it is working correctly. This can help identify if the issue is with the configuration or the external system.
  Check External System Status: Verify that the external system is up and running and that it is capable of accepting connections.
  Review SAP Logs: Check the SAP system logs (transaction SM21) and the developer trace files (transaction ST22) for any additional error messages that may provide more context about the issue.
  Update SAP Kernel: If the issue persists, consider updating the SAP kernel or applying relevant patches that may address known issues.
  User Authorization: Ensure that the user has the necessary authorizations to perform the communication.
  
  Related Information
  
  SAP Notes: Check SAP Notes related to the DU203 error for any specific fixes or recommendations provided by SAP.
  Documentation: Review the SAP documentation for CPIC and RFC communication for best practices and troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.