Bulletin number: 73
Products affected: D700D
Description: Library procedures for writing folded streams. Section 14.13.1 
Component: THE DOCUMENTATION
Date: Tue May 15 17:00:00 GMT 1990
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Library procedures for writing folded streams. Section 14.13.1 

A paragraph should be added towards the end of this section to
explain the protection against writing into valid foldsets.

The procedures which create new folds will return an error
fi.not.on.a.valid.fold if called on a fold bundle whose type attribute
is ft.foldset. If a program really wishes to write into such a bundle
this may be done by converting it into a ft.voidset  before attempting
to write into it. This may be done by:

send.command (from.uf, to.uf, uf.unmake.fold.set, 0, result)