This error message usually means that SAPgui is not able to load and make use of the Kerberos (GSSAPI) library on the computer. Error Message Unable to load GSS-API DLL named "gssapi32.dll" Error in SNC Check The wrong SNC library (in this example sncgss32.dll) is assigned to SAP GUI. Verify the environment variable SNC_LIB. Check that the environment variable SNC_LIB of the client host system is set to <Install_Path_SAP_GUI>\FrontEnd\SapGui\Encryption\secgss.dll For Secure Login Client the SNC library sapcrypto.dll is used. Example: C:\Program Files\SAP\FrontEnd\SecureLogin\lib\sapcrypto.dll How To Fix sncgss32.dll Mising? This error message usually means that SAPgui is not able to load and make use of the Kerberos (GSSAPI) library on the computer. From the control panel (add/remove programs), uninstall your current Kerberos for Windows Reboot (to let it finish removing library files) Install the newest Kerberos (4.0.1, at the time of writing) You can download Kerberos for Windows (KfW) from the IS&T Software Grid. Two files are available, 32-bit and 64-bit. It's best to choose the one that matches your computer, so if you have 64-bit windows, the 64-bit Kerberos download will work better for you. Reboot again Check to see if it works now.