about chgsum.pl

[haoshuang]

hello:
I'm a new user from china, now I come across a problem. When I input the order
chgsum.pl AECCAR0 AECCAR2
it say: chgsum.pl: command not found
I chmod the chgsum.pl before input the order.
I download the chgsum.pl script from this website.
who can tell me why!
thanks!
PS:forgive my poor English.

[graeme]

Download all the scripts and put the directory in your path. You should only need to have perl (and env) installed for this script to run.

[3dip.msu]

try:
perl chgsum.pl AECCAR0 AECCAR2