In addition to the other, very pertinent, general observations, a particular one.
The statement @list=<DIR>; after the file open will typically read all newline terminated lines from the file to the array. Each line, if I understand correctly, is a file name.
You then iterate through this array of newline terminated file names with foreach $tmp(@list) { ... }.
Without removing the newline, you try to use the file name in $tmp in a statement like `copy $source\\$tmp $dest\\$tmp`;. A little experimentation shows that the Windows copy function will take a newline in the middle of the string as the end of the command. This will look like copy somewhere\else\file.name and copy to the current directory.
This may be a part of your problem.
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