When the directory name has several nodes and the filename being paxed/untarred is a variable I guess it isn't interpolating correctly

$command= q{pax -r -f $file -s'/DirPart1.DirPart2.DirPart3/SubDir\//\/data\/kev\/atlanta\/emtex\/invoices\//p'};

I have tried several variants of this, such as
$command= q{pax -r -f $file -s'/DirPart1\.DirPart2\.DirPart3\/SubDir\//\/data\/kev\/atlanta\/emtex\/invoices\//p'};
When running this I get the error:
A file or directory in the path name does not exist.
which makes me think the string isn't being interpolated correctly.
I can see how using a different delimiter would obviate the need for using backslashes in the first example that works,
but in the second example don't I need escape backslashes for the '.' if not for the subdir '/'?

$file won't interpolate inside q{}. A handful of alternatives:
• $command = "pax -r -f $file -s'!DirPart1.DirPart2.DirPart3/SubDir/!/data/kev/atlanta/emtex/invoices/!p'"
• $command = qq{pax -r -f $file } . q{-s'/DirPart1.DirPart2.DirPart3\/SubDir\//\/data\/kev\/atlanta\/emtex\/invoices\//p'};
• $command = sprintf q{pax -r -f %s -s'/DirPart1.DirPart2.DirPart3/SubDir\//\/data\/kev\/atlanta\/emtex\/invoices\//p'}, $file;
• $command= q{pax -r -f $file -s'/DirPart1.DirPart2.DirPart3/SubDir\//\/data\/kev\/atlanta\/emtex\/invoices\//p'}; $command =~ s/\$file/$file/;
Or something else.

Thanks VERY much for your help. *Finally* got this to work

    $file =~ s/TGZ/tar/;
    $dir = $file;
    $dir =~ s!\.S75\.T...tar!\/Invoices\/!;
    if ($file =~ /(PROD.OPTBL.X.K.)(R*)(.S75.T11.tar)/) {
        $run=$2;
    }        

    $command = "pax -r -f $file -s'!$dir!/data/kev/atlanta/emtex/invoi
+ces/R$run/!p'";
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