Error when executing chgsum.pl

[Arindam Sannyal]

Dear Expertise

I am trying to use the available scripts from the VTST.Tools for calculating Bader charge transfer from surface to adsorbed molecule.

When I am trying to use the chgsum.pl script to sum up the AECCAR0 and AECCAR2, it's not executing and showing off some error command. But some other different  scripts (irrelevant) without any extension are working. I heard that these scripts with ".pl" extension are in "perl" format.

Herein I have attached a screenshot of the error command and also the related files. So I would like to know where is problem and how should I change the script file to execute in my linux system or any other possible solution? Frankly speaking I know very little about scripting. My system supports Fortran90/95 system.

Thank you in advance.

[Arindam Sannyal]

Sorry, now I can execute the script file. My mistake was in command. By the way thank you.