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Re: Weird error which shouldn't be an error

  • To: mathgroup at
  • Subject: [mg35380] Re: Weird error which shouldn't be an error
  • From: "Carl K. Woll" <carlw at>
  • Date: Wed, 10 Jul 2002 02:19:51 -0400 (EDT)
  • Organization: University of Washington
  • References: <agegpj$p84$>
  • Sender: owner-wri-mathgroup at

Hi Geoff,

You have discovered a problem with Mathematica that has existed ever since
version 3.0. When Mathematica saves the notebook, it usually condenses the
file by converting boxes to a shorter form, the one with backslashes.
Unfortunately, there are cases where the short form is ambiguous, and
Mathematica will sometimes convert the short form to a different box form
when the file is reopened, as you discovered. The workaround to this problem
is to change the option ShortBoxForm to False. Go to the option inspector,
change the scope to global or notebook, and search for ShortBoxForm. Change
the option to False.

This problem is discussed in a technical faq by Wolfram, the site is

Carl Woll
Physics Dept
U of Washington

"Geoff Tims" <Geoff at> wrote in message
news:agegpj$p84$1 at
> I have a program that works.  However, if I close it and open it, it
> work.  I get an error which says the following:
> Mathematica has detected a possible internal error. If possible, report
> error to support at, quoting "Assertion 'nboxesToSend == 1'
> at matheditio.c:1508", and describe in as much detail as possible what you
> were doing when the error occurred.
> I have no idea what this means, but I do know how to fix it after I have
> opened the program.  I have several comments  (* kajdlfkajdf *).  If I go
> the first one(and possibly others, I haven't tried) and type a space, then
> back space it, the program works perfectly.  What I don't get is by typing
> space and backspacing it I get the exact same thing, but one works and one
> doesn't.
> Does any one know what's going on here?  I'd like to not have to fix it
> every time I open it.  If I save after fixing it, it still doesn't work if
> open it again.
> Thank you much
> Geoff Tims

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