Hi all great people,

Today I read about using $^I from the following node in perlmonks, Use $^I (was Re: updating a file)
After that I have written a samle code and checked for the same.

#!/bin/perl

local $^I = "sub/.bak";
local @ARGV = ('/home/antony/perl/l.pl');

while ( <> ) {
        s/instance/NEW_PATTERN/;
        print;
}
[download]

I got the following error.

Error:
Can't rename /home/antony/perl/l.pl to /home/antony/perl/l.plsub/.bak:
+ No such file or directory, skipping file at l line 6.
[download]

1) what's wrong with the above code? Is the backup should reside in the same directory?