How To Fix 00721 - SNC deactivated, request refused

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 721

• Message text: SNC deactivated, request refused

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00721 - SNC deactivated, request refused ?

  The SAP error message "00721 SNC deactivated, request refused" typically indicates that the Secure Network Communications (SNC) feature is not activated or configured properly in your SAP system. SNC is used to provide secure communication between SAP systems and clients by encrypting the data transmitted over the network.
  Cause:
  
  SNC Not Activated: The SNC feature may not be activated in the SAP system profile.
  Configuration Issues: There may be issues with the SNC configuration, such as missing or incorrect parameters in the instance profile.
  Client Configuration: The client (e.g., SAP GUI) may not be configured to use SNC.
  SNC Library Issues: The required SNC libraries may not be installed or properly configured on the server or client side.
  User Authorization: The user may not have the necessary authorizations to use SNC.
  
  Solution:
  
  
  Activate SNC:
  
  Ensure that SNC is activated in the SAP system. You can do this by checking the instance profile parameters. Look for the parameter snc/enable and set it to 1 if it is not already set.
  Restart the SAP instance after making changes to the profile.
  
  
  
  Check SNC Configuration:
  
  Verify the SNC parameters in the instance profile. Key parameters include:
  
  snc/identity/as (to define the SNC identity)
  snc/lib (to specify the path to the SNC library)
  
  
  Ensure that the SNC library is correctly specified and accessible.
  
  
  
  Client Configuration:
  
  Ensure that the SAP GUI or other client applications are configured to use SNC. This can usually be done in the SAP GUI options under "Secure Network Communication".
  
  
  
  Install SNC Libraries:
  
  If the SNC libraries are not installed, you may need to install them. This could involve downloading the appropriate libraries from SAP or ensuring that they are included in your SAP installation.
  
  
  
  User Authorizations:
  
  Check the user authorizations to ensure that the user has the necessary permissions to use SNC. This may involve checking roles and profiles assigned to the user.
  
  
  
  Check Network Configuration:
  
  Ensure that there are no network issues preventing the establishment of an SNC connection.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to SNC for any specific issues or updates. For example, SAP Note 1000000 might provide additional insights or troubleshooting steps.
  Documentation: Refer to the official SAP documentation on SNC for detailed configuration steps and best practices.
  Logs: Review the SAP system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the issue.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.