SAP SSO – known errors and their solutions
While configuring SAP SSO, I encountered various errors. Here they are described together with the solutions:

Solution:
2304831 – Programs fail after CCL 8.5 is installed

Solution:
Problem with environment SNC_LIB. In place of:
SNC_LIB=gsskrb5.dll
should be:
SNC_LIB=C:\Program Files (x86)\SAP\FrontEnd\SecureLogin\lib\sapcrypto.dll

Solution:
sapgenpse seclogin -p SAPSNCSKERB.pse -O SIDADM

Solution:
Check notes: 2044027 – No logon ticket created after SPNego logon (ABAP)
Additional replace sapgenpse with a newer version. Details in the note: 1848999 – Central Note for CommonCryptoLib 8 (replacing SAPCRYPTOLIB)
Regenrate files *.PSE using the new sapgenpse and check transaction: SECSTORE

Solution:
We’re using the wrong library. Instead of libgssapi_krb5.so we should use libsapcrypto.so

Solution:
Secstore (Secure Storage -> transaction: SECSTORE) had wrong passwords for SPNego. You should once again enter the correct passwords in SPNEGO transaction.

Solution:
Check note: 2345858 – SAP SSO Fixes for Secure Login Client 3.0 SP 00 Patch 02