[texhax] Mysterious error

[barbara beeton]

Dear William Lee Valentine,

I'm not able to process your file (I don't currently
have a working TeX installation), but I have an educated
guess that the problem is in the string " \\ \\ " in the
following \lhead:

   \lhead{\fancyplain{}{Annual Business Plan: 2019\\Personal Recovery 
Press,
   LLC \\ \\ William Lee Valentine\\%
   Revision 0: Thursday, 24 January 2019\\Page \thepage}}

That indicates that you want a blank line, and indeed a
blank line has nothing on it to end.  A better way to
indicate this is to have just a single line ending with
an optional indication that you want to skip some vertical
space:

   \\[1\baselineskip]

Try that and see if it doesn't get rid of the error message.

The timing of the error message I thini is not related to
the main text, but to the fact that this appears in the
heading which is probably not acted on until the first page
is output.
 						-- bb

On Tue, 26 Feb 2019, William Lee Valentine wrote:

> Sir or Madam --
>
> I am a former member of Tug, and would still be if I could afford the
> annual dues.
>
> I have used TeX and LaTeX to write a book, and have successfully
> typeset, printed, and bound it. I have now written, as a report, a
> business plan; but it fails with the error
>
>   There's no line here to end.
>
> at the end of one of the subsections in the fourth section of the plan.
>
> I am not making special use of vertical space, at the end of any
> subsection, so far as I am aware; I have no idea why this error appears.
>
> [...]