I fixed the problem. So when I was executing the script the /path/ it doesnt load the data files opened by the script because I didnt have the path included to the data files in the script since I assumed they were in the same directory. However, I think the shell script executes the files from a different directory, so I just added

cd /pathofdirectory/
/pathofperl/perl /pathofscript/script.pl
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Ok, I figured out the problem and it's really weird. When I go into the directory using "cd" and execute the script from there "perl script.pl" it works. I just tried it on windows too. But whenever I try "perl /path/script.pl" it gives me that data set error.

The script probably expects the data file in the directory from which it was started. If you start it from a different one, it cannot find the data.
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