Hi monks, I am trying to rename file across different directories and I am getting a "Is a directory" error when I shouldn't be. Here is a snippet of my code. 
#!/usr/bin/perl -w
use File::Copy;
use File::Path;

use strict;
use warnings;

....
/* 
$filename, $pat_name, $study_date, $study_time, $series_num are define
+d
*/
....

my ($new_filename, $dir_path);

#create new pathname
$dir_path = "$pat_name/$study_date-$study_time/$series_num";
   
#create new filename
$new_filename="$pat_name-$study_date-$study_time-$series_num-$image_nu
+m.dcm";

eval { mkpath($dir_path) }; 
if ($@) {
   print "Couldn't create $dir_path: $@";
}

$new_filename = "$dir_path/$new_filename";


rename($filename,$new_filename) or die( "could not rename $filename to
+ $new_filename: $!\n" );

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Instead of the rename, I have tried: 
system("mv",$filename,$new_filename) or die("could not rename $filenam
+e to $new_filename: $!\n");

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or 
move($filename,$new_filename) or die("could not rename $filename to $n
+ew_filename: $!\n");

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with no luck. Here is a sample print out: 
could not rename 1.2.840.113619.2.55.1.1762883246.3061.1000220985.209/
+1.2.840.113619.2.55.1.1762883246.3061.1000220985.210/1.2.840.113619.2
+.55.1.1762883246.3061.1000220985.212.dcm to S000109A33/20010911-12560
+2/1/S000109A33-20010911-125602-1-2.dcm: Is a directory

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It is not a question of permission because permissions are set as a+rwx. Any help will be appreciated. I have been struggling with this for a while. I am using Perl 5.8.5.

---- UPDATE -----

I think the error is caused by the mkpath function. The directory structure is not created. I tried: 
if( ! -e $dir_path) { system("mkdir","-p",$dir_path); }

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I also tried writing my own recursive mkdir subfunction, but the -e and -d misbehave and claims a folder exists when it doesn't. With this code: 
system("mkdir","-p",$dir_path) or warn("could not make dir $dir_path: 
+$!\n");

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I get an "Illegal seek" error. Please help! Thank you.

---- UPDATE -----

I manually created the directory structure for the new filename and reran the script. Getting the rename error.

In reply to Weird rename error by datmrman

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