How To Fix E1120 - Packet size for asynchronous RFC has errors: &

SAP Error Message - Details

• Message type: E = Error

• Message class: E1 - Messages for IDoc Basis

• Message number: 120

• Message text: Packet size for asynchronous RFC has errors: &

Self-Explanatory Message

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message E1120 - Packet size for asynchronous RFC has errors: & ?

  The SAP error message E1120, which states "Packet size for asynchronous RFC has errors: &," typically indicates an issue with the configuration of the Remote Function Call (RFC) settings in your SAP system. This error can occur when the packet size for asynchronous RFC communication exceeds the allowed limits or is incorrectly configured.
  Causes:
  
  Configuration Issues: The packet size for asynchronous RFC may be set incorrectly in the SAP system configuration.
  Network Issues: Network problems can lead to packet fragmentation or loss, which may trigger this error.
  Version Compatibility: Incompatibility between different SAP system versions or between SAP and third-party systems can also lead to this error.
  Resource Limitations: Insufficient system resources (like memory or processing power) can affect the handling of RFC calls.
  
  Solutions:
  
  
  Check RFC Configuration:
  
  Go to transaction RZ10 to check the profile parameters related to RFC. Look for parameters like rfc_max_packet_size and ensure they are set to appropriate values.
  Adjust the rfc_max_packet_size parameter if necessary. The default value is usually sufficient, but it may need to be increased based on your specific requirements.
  
  
  
  Review Network Settings:
  
  Ensure that the network settings between the SAP systems are correctly configured. Check for any firewalls or routers that might be affecting packet sizes.
  Monitor network performance to identify any potential bottlenecks or issues.
  
  
  
  Check System Resources:
  
  Monitor the system resources (CPU, memory, etc.) to ensure that the SAP system has enough resources to handle the RFC calls.
  If necessary, consider scaling up the resources or optimizing the system performance.
  
  
  
  Update SAP System:
  
  Ensure that your SAP system is up to date with the latest patches and updates. Sometimes, bugs in earlier versions can lead to such errors.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be known issues or patches available.
  
  
  
  Test with Different Settings:
  
  If you have recently changed any settings related to RFC, consider reverting those changes to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SM58 (for monitoring asynchronous RFC calls) and SM21 (for system logs) to gather more information about the error.
  SAP Documentation: Refer to the official SAP documentation for detailed information on RFC configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.