How To Fix 00770 - SNC name of the partner system not in ACL system

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 770

• Message text: SNC name of the partner system not in ACL system

What causes this issue?

Communication from another system (R/3 System or other system) using
Secure Network Communications (SNC) was encountered. The SNC name (name
for the external security system) of the R/3 partner system is not in
the table SNCSYSACL for the target system or not permitted for the
corresponding communication mode (RFC/CPIC/DIAG).

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

System Response

The target system terminates the connection.

How to fix this error?

The table SNCSYSACL is an Access Control List (ACL) containing a list
of valid partner systems for SNC protected communication.
If communication was terminated by a valid system, add an entry to the
table SNCSYSACL or activate the relevant communication mode.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 00770 - SNC name of the partner system not in ACL system ?

  The SAP error message "00770 SNC name of the partner system not in ACL system" typically occurs in the context of Secure Network Communications (SNC) when there is an issue with the configuration of the SNC names in the Access Control List (ACL). This error indicates that the SNC name of the partner system you are trying to connect to is not recognized or is not listed in the ACL.
  Cause:
  
  Missing SNC Name: The SNC name of the partner system is not defined in the ACL of the SAP system you are trying to connect to.
  Incorrect Configuration: There may be a misconfiguration in the SNC settings, such as incorrect SNC names or parameters.
  Network Issues: There could be network connectivity issues preventing the systems from communicating properly.
  SNC Library Issues: The required SNC libraries may not be installed or configured correctly on either the client or server side.
  
  Solution:
  
  
  Add SNC Name to ACL:
  
  Access the transaction code SNC0 in the SAP GUI.
  Check the ACL entries and ensure that the SNC name of the partner system is included.
  If it is not present, add the SNC name to the ACL.
  
  
  
  Verify SNC Configuration:
  
  Ensure that the SNC parameters are correctly configured in the SAP system. This includes checking the snc/enable and snc/identity/as parameters in the instance profile.
  Make sure that the SNC name format is correct and matches the expected format.
  
  
  
  Check Network Connectivity:
  
  Verify that there are no network issues preventing communication between the systems.
  Use tools like ping or traceroute to check connectivity.
  
  
  
  Review SNC Libraries:
  
  Ensure that the necessary SNC libraries are installed and properly configured on both the client and server systems.
  Check for any updates or patches that may be required for the SNC libraries.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for SNC configuration and troubleshooting for more detailed steps and best practices.
  
  
  
  Related Information:
  
  SNC Configuration: The configuration of SNC involves setting up secure communication between SAP systems and external systems. This includes defining SNC names, configuring the ACL, and ensuring that the necessary security libraries are in place.
  SAP Notes: Check SAP Notes related to SNC for any known issues or additional troubleshooting steps. You can search for relevant notes in the SAP Support Portal.
  Security Policies: Ensure that your organization's security policies allow for the use of SNC and that any required certificates are properly installed and trusted.
  
  By following these steps, you should be able to resolve the error message and establish a secure connection between the SAP systems.