SAP Agent SNC setup: No credentials were supplied
Article ID: 427254
Updated On:
Products
Issue/Introduction
Customer wants to set up an encrypted connection (Secure Network Connection (SNC)) between UC4 SAP agent, which is located on UC4 Windows Server and a SAP system, which is located on Linux server.
Activate the Enable SNC checkbox to enable the SNC mode. I set up in connection object next parameters for SNC.
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Path to SNC Service Library = <PATH>\sapcrypto.dll
The name of the local SNC library.
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Level of Security = 3 (default)
The SNC service quality.
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SNC Partner Name = p:CN=<DISTINGUISHED_NAME_SYSTEM>
The name of the SNC partner system.
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Own SNC Name = empty
The own SNC name (optional).
-
Enable SSO = yes
Activate the checkbox for the SSO connection.
The setup of the certificate on the client side using with sapgenpse was done following the AutoSys documentation:
The following RFC error occurs:
RfcException raised by system [<noSID>|<IP_address>|<SYSTEM_NR>]:
message: Establishing connection to communication partner failed at CPIC-CALL: CMRCV on convId: 89815180 with rc: 20
connection parameters: TYPE=A DESTINATION=<SAP_SYSTEM> CLIENT=000 USER=<USER> LANG=DE ASHOST=<IP_address> SYSNR=<SYSTEM_NR> SNC_MODE=1 SNC_QOP=8 SNC_PARTNERNAME="p:CN=<DISTINGUISHED_NAME_SYSTEM>" SNC_MYNAME="p:CN=<DISTINGUISHED_NAME_CLIENT>" TRACE=1 PCS=1
LOCATION CPIC (TCP/IP) with Unicode
ERROR GSS-API(maj): No credentials were supplied
Unable to establish the security context
target="p:CN=<DISTINGUISHED_NAME_SYSTEM>"
TIME Fri Jan 16 15:20:23 2026
RELEASE 754
COMPONENT SNC (Secure Network Communication)
VERSION 6
RC -4
MODULE <PATH>/sncxxall.c
LINE 3604
DETAIL SncPEstablishContext
SYSTEM CALL gss_init_sec_context
COUNTER 4
return code: RFC_FAILURE (RFC_FAILURE)
error group: RFC_ERROR_COMMUNICATION
Cause
Configuration changes not taken into account.
Resolution
The SAP Agent needs to be restarted to take the configuration changes with sapgenpse into account.
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