How To Fix SCWN850 - Could not read version in RFC connection &1 to system &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SCWN - Messages Note installation and management

• Message number: 850

• Message text: Could not read version in RFC connection &1 to system &2

What causes this issue?

The SAP Note implementation test requires from connection &V1& a version
of an object for correction instructions that belongs to a subcomponent.

System Response

The software in the version server &V2& is not yet able to calculate
versions for subcomponents.

How to fix this error?

Create an IT/IBC message for system &V2&. The processing component is
usually DEV-<component-GEN>. For example, the component responsible for
SAP-BASIS is DEV-NWPROD-SYS-ADM, and the component for the core is
DEV-CORE-GEN. Sometimes the responsible component is noted on the logon
screen (if you are logging on without Single Sign-On (SSO)). If you do
not know the responsible component, your quality team can provide
additional information.

Procedure for System Administrators

The administrators of system &V2& need to import SAP Note 1283700 into
system &V2&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SCWN850 - Could not read version in RFC connection &1 to system &2 ?

  The SAP error message SCWN850 indicates that there is an issue with the Remote Function Call (RFC) connection to a specified system. This error typically arises when the system is unable to read the version information from the target system due to various reasons. Below are the potential causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP systems.
  RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  System Availability: The target system may be down or not reachable.
  Version Compatibility: There may be compatibility issues between the source and target systems, especially if they are running different versions of SAP.
  SAP Kernel Issues: The SAP kernel on either the source or target system may be outdated or corrupted.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Ensure that the network connection between the two systems is stable and functioning. You can use tools like ping or traceroute to test connectivity.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI and check the configuration of the RFC destination. Ensure that the connection type, target host, and system number are correctly set.
  Test the connection from SM59 to see if it can successfully connect to the target system.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system. You may need to check roles and profiles assigned to the user.
  
  
  
  System Availability:
  
  Verify that the target system is up and running. You can check the system status in the SAP GUI or through system monitoring tools.
  
  
  
  Check Version Compatibility:
  
  Ensure that both systems are compatible in terms of SAP versions. If there are significant differences, consider upgrading or patching the systems.
  
  
  
  Update SAP Kernel:
  
  If the issue persists, consider updating the SAP kernel on both systems to the latest version. This can resolve compatibility issues and bugs.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage and test RFC connections.
  SICF: To check and manage HTTP services, if applicable.
  ST22: To check for dumps that may provide more context on the error.
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Logs: Review the system logs (transaction SM21) for any related error messages that could provide more context about the issue.
  
  
  By following these steps, you should be able to diagnose and resolve the SCWN850 error in your SAP environment. If the problem persists, consider reaching out to SAP support for further assistance.