$ perldoc -f chdir
       chdir EXPR
       chdir FILEHANDLE
       chdir DIRHANDLE
       chdir   Changes the working directory to EXPR, if possible. If 
+EXPR is
               omitted, changes to the directory specified by $ENV{HOM
+E}, if
               set; if not, changes to the directory specified by
               $ENV{LOGDIR}. (Under VMS, the variable $ENV{SYS$LOGIN} 
+is also
               checked, and used if it is set.) If neither is set, "ch
+dir"
               does nothing. It returns true on success, false otherwi
+se. See
               the example under "die".

               On systems that support fchdir(2), you may pass a fileh
+andle or
               directory handle as argument.  On systems that don't su
+pport
               fchdir(2), passing handles raises an exception.
$
[download]

Also modifing that line, is not working, also I figured, that the file removal is not working, only I just don't get any error messages:(.

What toolic (probably) meant was the "example under "die"" mentioned in the docu of chdir. If you do "perldoc -f die" you will see these two examples:

   die "Can't cd to spool: $!\n" unless chdir '/usr/spool/news';
   chdir '/usr/spool/news' or die "Can't cd to spool: $!\n"
[download]

The two lines are equivalent (to each other and to the line toolic posted) and show how to use chdir, specifically the use of $! to print the error message that the operating system returned.

The error message will tell you why it couldn't chdir. But to further explore the situation add

use Cwd;   #at the start of your script

...

print "We are here: ",cwd(),"\n"; #test where you are in the directory
+ structure

#alternatively this works too, but is not as portable:
print "We are here:"; system('pwd');
[download]