using chgsum.pl

[raji]

I have downloaded the vtstscripts.tar.gz and unzipped. Then defined the path in .bash_profile.
Tried to sum the 2 charge density files using the chgsum.pl script using the command
chgsum.pl (AECCAR0) (AECCAR2) (fact1) (fact2)
I got the error,
bash: syntax error near unexpected token `AECCAR0'

Any one can help me in this regard.

Thanks in advance

[graeme]

Do you have perl installed? If you try running the chgsum.pl script without any arguments, do you get an error message that looks like this:

usage: chgsum.pl <CHGCAR1> <CHGCAR2> <fact1> <fact2>

Actually, now that I look at your message, it could be a simpler problem. Try this command:

chgsum.pl AECCAR0 AECCAR2

without the brackets.

[raji]

If i use the command chgsum.pl AECCAR0 AECCAR2
output is,
Can't open file No such file or directory at /root/SOFTWARES/vtstscripts/chgsum.pl line 6.