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Message type: E = Error
Message class: T2 - General Treasury
Message number: 556
Message text: RFC link & interrupted, no RFC back-up link available
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
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T2556
- RFC link & interrupted, no RFC back-up link available ?The SAP error message T2556, which states "RFC link & interrupted, no RFC back-up link available," typically indicates an issue with the Remote Function Call (RFC) connection between SAP systems. This error can occur due to various reasons, including network issues, configuration problems, or system resource limitations.
Causes:
- Network Issues: Problems with the network connection between the SAP systems can lead to interruptions in the RFC link.
- Configuration Errors: Incorrect settings in the RFC destination configuration can cause the link to fail.
- System Resource Limitations: If the SAP system is under heavy load or if there are insufficient resources (like memory or CPU), it may not be able to maintain the RFC connection.
- Timeout Settings: If the timeout settings for the RFC connection are too low, it may lead to premature disconnections.
- Firewall or Security Settings: Firewalls or security settings may block the RFC communication between systems.
Solutions:
- Check Network Connectivity: Ensure that there is stable network connectivity between the SAP systems. You can use tools like
ping
ortraceroute
to diagnose network issues.- Review RFC Destination Configuration: Go to transaction
SM59
and check the configuration of the RFC destination. Ensure that the settings (like target host, system number, client, user, and password) are correct.- Monitor System Resources: Use transaction
SM50
orSM66
to monitor the workload on the SAP system. If the system is overloaded, consider optimizing performance or increasing resources.- Adjust Timeout Settings: In transaction
SM59
, you can adjust the timeout settings for the RFC destination. Increasing the timeout may help prevent disconnections.- Check Firewall Settings: Ensure that the necessary ports for RFC communication are open and that there are no firewall rules blocking the connection.
- Restart the RFC Connection: Sometimes, simply restarting the RFC connection can resolve temporary issues. You can do this in transaction
SM59
by selecting the RFC destination and using the "Test Connection" option.Related Information:
Transaction Codes:
SM59
: RFC Destinations (Display/Maintain)SM50
: Work Process OverviewSM66
: Global Work Process OverviewST22
: Dump Analysis (to check for any ABAP runtime errors)SMD1
: Monitor RFC ConnectionsSAP Notes: Check SAP Notes related to RFC issues for any specific patches or updates that may address known problems.
Logs: Review system logs (transaction SM21
) for any related error messages that could provide more context on the issue.
If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.
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