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Strange Behaviour: CellAutoOverwrite

  • To: mathgroup at smc.vnet.net
  • Subject: [mg100944] Strange Behaviour: CellAutoOverwrite
  • From: Alois Steindl <Alois.Steindl at tuwien.ac.at>
  • Date: Thu, 18 Jun 2009 20:44:33 -0400 (EDT)
  • Organization: Inst. f. Mechanics II, TU Vienna

Hello,
I encountered the following strange and nasty behaviour, currently with
Mathematica 7.0.1:
In a Notebook suddenly the output cells had the attribute
CellAutoOverwrite->False, which had 2 nasty side-effects:
The output of subsequent commands in one cell was displayed in the wrong
order: 
   a=1
   b=2
gives
   Out[2]=2
   Out[1]=1
which can be quite confusing, if one expects the answers in the usual
order. And further the previous output wasn't overwritten, but the new
output was prepended to it, making the Notebook larger and larger.

For this notebook I could cure the problem by cutting and pasting the
problematic cells to new cells, which then behaved normally.

What could I have done to evoke this behaviour?
How would one reset it, without to have to copy and paste all involved
cells?

Kind regards
Alois

-- 
Alois Steindl,                           Tel.: +43 (1) 58801 / 32558      
Inst. for Mechanics and Mechatronics     Fax.: +43 (1) 58801 / 32598
Vienna University of Technology,         A-1040 Wiedner Hauptstr. 8-10   


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