To run VariCAD 9.0 on Mandrake 10.1, you need to install the following packages from the Mandrakelinux 10.1 original CDs:
from CD1 - libstdc++5-3.3.4-1mdk.i586.rpm
from CD4 - libstdc++2.10-2.96-0.83mdk.i586.rpm