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

00770 - Overview

• 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.

00770 - Details

• 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