Hi Stuart,

It seems that nobody want to comment on this one so I will have a go.

As the Null 00H is arguably not a valid ASCII character I would always do what you did and remove them first or replace them with a space. If using PlanetPress Watch, this can be done as part of the process. Note that a file formatted for a printer should never normally contain a null.

As Line Printer emulation can't be expected to handle a null, User Defined is probably the best approach.