A problem was discovered in the version of the DTB Write Protect program posted on the NLS web page this morning.  An updated version 1.2.1 has been substituted.  If you have already downloaded 1.2, please update to the later version 1.2.1.



                                           NLS Operations Alert


no. 11-44




DATE                :     June 7, 2011


TO                      :     Network Libraries

FROM               :     Michael Katzmann, Chief, Materials Development Division


SUBJECT         :     Updated DTB cartridge write protect software


While testing the digital talking-book (DTB) USB cartridge, NLS engineers discovered that the controller (which was recently modified by Northstar Systems to accommodate the latest generation of flash memory) has a problem when attempting to remove the passphrase from a write-protected cartridge. Cartridge lots EB004 and greater exhibit this problem; Northstar Systems suspended shipment of cartridges on June 1, 2011, before any of the problem cartridges purchased by network libraries were shipped.


To avoid the problem, NLS has modified the DTB cartridge write-protect software. Libraries using the DTB write-protect software should immediately upgrade to the latest version to avoid trouble with new cartridges.


Version 1.2 of the DTB cartridge write-protect software can be obtained at


Libraries using the Gutenberg duplicator, which has built-in write-protection functionality, must also update to the current version.                                                                                                                               


Version 2.0 of the Gutenberg software can be obtained from


For more information contact:


            Michael Katzmann

            Chief, Materials Development Division

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