UPDATE3 : SORRY, I HAVE JUST REALISED THAT THE FILES EXIST, EXCEPT THEY ARE IN SOME CHILD DIRECTORIES. SO THERE IS NO PROBLEM ANY MORE.

Hello Deak Monks

I would like to get the errors which concern a certain script (here prog2.pl) in my program, which is composed of several scripts, like: 

my $cmd1 = "perl prog1.pl";
system($cmd1);
my $cmd2 = "perl prog2.pl";
system($cmd2);
my $cmd3 = "perl prog3.pl";
system($cmd3);

[download]

So for the script concerned (prog2.pl for example) , I write: 

BEGIN {
  open(STDERR, ">stderr2.log")
    or die "Failed to open log file";
}

[download]

Then I write 

close STDERR;

[download]

So that each time I invoke my script, it write only the errors for this part. However at the end, I have nothing. Could you explain ? Thanks

update: I erased the term subscript, as it was too ambiguous. update2 : just as cdarke said, what I called "subscript" meant another script being called as a child process. Sorry for the ambiguity. UPDATE3 : SORRY, I HAVE JUST REALISED THAT THE FILES EXIST, EXCEPT THEY ARE IN SOME CHILD DIRECTORIES. SO THERE IS NO PROBLEM ANY MORE.

In reply to get the errors only for a part of the program by steph_bow

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