I understood the differences that were mentioned at the following link. Differences between SIunits and siunitx packages
I am using TexStudio and MikTeX (perhaps the most recent version, considering that I downloaded the whole bundle yesterday) for typesetting my document. After changing all \unit to \SI I am still getting errors like line 0 Undefined control sequence.
How should I get around this problem?
SIunitsinput. – Joseph Wright Sep 23 '12 at 18:02