What do you mean: .. have used both correctly...

Plain MLDBM and Storable are complementary. You can use both to store a multilevel hash to disk. In fact MLDBM can use Storable as serialiser. So you don't need to use both.

You need to use

use MLDBM qw(DB_File Storable);
[download]

I hope this helps. If not, please post some code.
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Dr. Mark Ceulemans
Senior Consultant
IT Masters, Belgium