Thank you all for your reply.
I eventually managed to launch to setup properly on a Solaris 10 machine. I needed to install ASE 12.5.4 because the application I am working with needs it and ASE 15.7 didn't work properly for it. I have been told my client runs ASE 12.5.4 on Solaris 11 but clearly it was wrong. My problem was therefore certainly related to this (system call deprecated on Solaris 11).
Thank you,
Regards,