Specify job working directory in Sun Grid Engine

I can use -cwd flag in the script to specify that the script directory is also the job working directory. So I basically have two options:

• specify -cwd and set the script directory as the job directory
• omit -cwd and do not explicitly set job directory

In the latter case, my job is run in directory specified by my $HOME value. My question is how can I specify job working directory. For example, suppose I have the following directory:

|main----------|sub----mydata.txt
|--myscript.sh

With the contents of my script being:

#!bin/bash
tail mydata.txt -n 1 > output.txt

If I specify flag -cwd then the job will fail - since there is no mydata.txt in my main directory - it's found in directory named sub. I've tried adding the following commands before my main command:

export $HOME=main/sub

But it still does not work.

Use the -wd option. No c required.