> I would want to check only these values...

If you already have the list, just process it...

for ( $hash1{key1}, $hash1{key2}{key22}, $hash1{key2}{key23} ){
    
    $_ = File::Spec->file_name_is_absolute($_) ? $_ : File::Spec->rel2
+abs($_)
}
[download]

If you want to copy and modify, just copy the hash and modify the copy. Anyway Data::Diver is a very cool module, but when simpler solutions are use them.

L*