How To Fix WW304 - Call failed in the target system

SAP Error Message - Details

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 304

• Message text: Call failed in the target system

What causes this issue?

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

System Response

How to fix this error?

INCLUDE ISR_SYSTEMFEHLER

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WW304 - Call failed in the target system ?

  The SAP error message WW304, which states "Call failed in the target system," typically occurs in the context of Remote Function Calls (RFC) or when trying to execute a function module in a different SAP system. This error can arise due to various reasons, and understanding the cause is crucial for finding a solution.
  Causes of WW304 Error
  
  
  Network Issues: There may be connectivity problems between the source and target systems, such as network outages or misconfigured network settings.
  
  
  Authorization Issues: The user executing the function may not have the necessary authorizations in the target system.
  
  
  Configuration Errors: The RFC destination may not be correctly configured in the source system, leading to failed calls.
  
  
  System Availability: The target system may be down or undergoing maintenance, making it unavailable for calls.
  
  
  Function Module Issues: The function module being called may not exist in the target system, or it may have been changed or deactivated.
  
  
  Data Issues: The data being sent to the target system may not meet the expected format or constraints, causing the call to fail.
  
  
  Solutions to WW304 Error
  
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the source and target systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Verify RFC Destination: Go to transaction SM59 in the source system and check the configuration of the RFC destination. Ensure that the connection parameters are correct and that the connection test is successful.
  
  
  Check Authorizations: Verify that the user has the necessary authorizations in the target system. You can check this using transaction SU53 after the error occurs.
  
  
  System Status: Check the status of the target system to ensure it is up and running. You can do this by logging into the target system or checking with your system administrator.
  
  
  Function Module Availability: Ensure that the function module being called exists in the target system and is active. You can check this using transaction SE37 or SE80.
  
  
  Review Data Being Sent: Check the data being sent to the target system for any inconsistencies or format issues. Ensure that it meets the expected structure and constraints.
  
  
  Check Logs: Review the application logs or system logs in both the source and target systems for any additional error messages or clues that can help diagnose the issue.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SU53: Authorization Check
  ST22: Dump Analysis
  SLG1: Application Log
  
  
  
  SAP Notes: Check SAP Notes related to WW304 for any specific patches or updates that may address known issues.
  
  
  Documentation: Review SAP documentation for RFC and remote calls to understand the expected behavior and troubleshooting steps.
  
  
  By following these steps, you should be able to identify the cause of the WW304 error and implement a solution to resolve it. If the issue persists, consider reaching out to SAP support for further assistance.