Dear mscharrer Thanks a lot for your help

I have taken into consideration what you have said. In fact the last line of my subroutine is: 

chdir("$path_to_the_script_directory") or die;

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And I do not have any errors (when I do not use "or die" for process() )

But in my operations of process(), I have used : 

while (my $line = <$INFILE>){

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And when I want to print $_ after the loop, I have : 

Use of uninitialized value in concatenation (.) or string at

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In reply to Re^2: &process or die by steph_bow
in thread &process or die by steph_bow

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