How To Fix TG760 - Unable to initialize the RFC group 'parallel_generators'

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 760

• Message text: Unable to initialize the RFC group 'parallel_generators'

What causes this issue?

An error occurred while the system attempted to start the RFC group
parallel_generators, which is defined for parallel generation.

System Response

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

How to fix this error?

Use transaction RZ12 to check the definition of the RFC group
'parallel_generators'. If some servers are no longer available in the
group that is selected in transaction SGEN, you must delete them from
the RFC group.
Start transaction SGEN again and choose <ZK>Regenerate the Objects of
the Last Run -> Restart</>. On the <ZK>Selection of Servers for
Parallel Generation</> screen, you can reselect the available servers.
After you have done this, choose <ZK>Continue</> and then <LS>Start job
</> to restart the generation job.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TG760 - Unable to initialize the RFC group 'parallel_generators' ?

  The SAP error message TG760, which states "Unable to initialize the RFC group 'parallel_generators'," typically occurs in the context of Remote Function Call (RFC) communication in SAP systems. This error can arise due to various reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes:
  
  
  Configuration Issues: The RFC group may not be properly configured in the SAP system. This could include missing or incorrect settings in the RFC destination or group configuration.
  
  
  Network Issues: There may be network connectivity problems between the SAP application server and the target system, preventing the initialization of the RFC group.
  
  
  Resource Limitations: The system may be experiencing resource limitations, such as insufficient memory or CPU resources, which can hinder the initialization of the RFC group.
  
  
  Authorization Issues: The user or service account attempting to initialize the RFC group may lack the necessary authorizations to perform this action.
  
  
  System Load: High system load or performance issues can also lead to problems with initializing RFC groups.
  
  
  Solutions:
  
  
  Check RFC Configuration:
  
  Go to transaction SM59 and verify the configuration of the RFC destination associated with the 'parallel_generators' group.
  Ensure that the destination is correctly set up and that the connection parameters are valid.
  
  
  
  Test Connectivity:
  
  Use the "Connection Test" feature in transaction SM59 to check if the RFC destination can be reached successfully.
  If there are connectivity issues, investigate network settings, firewalls, or any other network-related configurations.
  
  
  
  Monitor System Resources:
  
  Check system performance using transaction SM50 or SM66 to see if there are any resource bottlenecks.
  If necessary, optimize system performance or increase resources.
  
  
  
  Review Authorizations:
  
  Ensure that the user or service account has the necessary authorizations to access and initialize the RFC group.
  Use transaction SU53 to analyze authorization failures if applicable.
  
  
  
  Check System Logs:
  
  Review system logs (transaction SM21) and short dumps (transaction ST22) for any related error messages that could provide more context on the issue.
  
  
  
  Restart Services:
  
  If the issue persists, consider restarting the relevant SAP services or the entire application server to clear any temporary issues.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  RFC Groups: RFC groups are used in SAP to manage parallel processing of tasks across multiple application servers. Proper configuration and management of these groups are crucial for performance and reliability.
  SAP Basis Administration: Understanding the role of SAP Basis administrators in managing system configurations, performance, and troubleshooting is essential for resolving such issues.
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be necessary to engage SAP support for further assistance.