How To Fix PO460 - Protocol error (return code &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: PO - Spooler message

• Message number: 460

• Message text: Protocol error (return code &1)

Self-Explanatory Message

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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Smart SAP Assistant

• What is the cause and solution for SAP error message PO460 - Protocol error (return code &1) ?

  The SAP error message PO460, which indicates a "Protocol error (return code &1)," typically occurs in the context of communication between SAP systems or between an SAP system and an external system. This error can arise due to various reasons, including network issues, configuration problems, or protocol mismatches.
  Causes of PO460 Protocol Error
  
  Network Issues: Problems with the network connection can lead to communication failures between systems.
  Configuration Errors: Incorrect settings in the RFC (Remote Function Call) destination or in the communication parameters can cause protocol errors.
  Version Mismatch: If the systems involved are running different versions of the SAP software or different communication protocols, this can lead to incompatibility.
  Firewall or Security Settings: Firewalls or security settings may block the necessary ports or protocols required for communication.
  Timeouts: If a request takes too long to process, it may time out, leading to a protocol error.
  Resource Limitations: Insufficient resources (like memory or processing power) on either the client or server side can lead to communication failures.
  
  Solutions to PO460 Protocol Error
  
  Check Network Connectivity: Ensure that there is a stable network connection between the systems. Use tools like ping or traceroute to diagnose network issues.
  Review RFC Destination Settings: Verify the configuration of the RFC destination in transaction SM59. Ensure that the connection parameters are correct and that the target system is reachable.
  Check SAP Notes: Look for any relevant SAP Notes that may address known issues related to this error. SAP frequently releases updates and patches that can resolve such problems.
  Update Software: Ensure that both systems are running compatible versions of SAP software. If necessary, apply updates or patches to align versions.
  Firewall Configuration: Check firewall settings to ensure that the necessary ports for SAP communication are open. Common ports include 3200 for SAP GUI and 3300 for RFC.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings in the RFC destination configuration.
  Monitor System Resources: Check the performance of both the client and server systems to ensure they have adequate resources available.
  
  Related Information
  
  Transaction Codes: Use transaction codes like SM21 (System Log) and ST22 (Dump Analysis) to check for additional error messages or dumps that may provide more context about the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages for further analysis.
  
  By following these steps, you should be able to diagnose and resolve the PO460 protocol error in your SAP environment.