I found an old conversation about the same issue but it is not ended with a solution !
Despite many actions I still have the same error when login into my SAP System via SNC.
Abap: Common sapcrypto installed
RZ10
snc/accept_insecure_cpic = 1
snc/permit_insecure_start = 1
snc/gssapi_lib = /usr/sap/SB2/SYS/exe/run/libsapcrypto.o
snc/identity/as = p: CN=ehxs82fr.fr.intra.net, OU=GID, O=EH, C=EN
snc/accept_insecure_gui = 0
snc/enable = 1
SMLG: shows that SNC is active
Windows client
Client SAPcryptolib Installed
Envir. Variables
SECUDIR=C:\Users\mcolombe\Documents\SNCsec
SESSIONNAME=Console
SNC_LIB=C:\Program Files (x86)\SAP\FrontEnd\SapGui\Encryption\secgss.dll
SNC_LIB_64=C:\Program Files\SAP\FrontEnd\SecureLogin\lib\sapcrypto.dll
And then when I logon with sapgui 7.40 I always received
GSS-API(gss) no credentials were supplied....
Could you help on this ?