Hello,
That event happend to me as well, it means that the sybase installer doesn't have enough space on /tmp to extract its necessary files to launch installation.
What you have to do is real simple. Since the setup.bin, uses the variable IATEMPDIR.
So set the environment variable IATEMPDIR to another folder with more space.
Something like this:
setenv IATEMPDIR = '[new folder]'
export IATEMPDIR
This will work, just choose a device with some free space like 2gb must be enough but the more you have better, and after install you can delete this folder so is just temporary won't affect your space.
It worked for me.
