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Topic: Mathematica 9: bug in merging cells
Replies: 5   Last Post: Dec 7, 2012 1:36 AM

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David Reiss

Posts: 602
Registered: 2/24/06
Re: Mathematica 9: bug in merging cells
Posted: Dec 6, 2012 4:55 AM
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I reported the bug.


On Dec 5, 3:11 am, Rafapa <raf...@simulux.us.es> wrote:
> On Tuesday, December 4, 2012 10:09:37 AM UTC+1, Fred Simons wrote:
> > When writing a larger program, I usually test the single steps in
>
> > separate cells, then merge these cells and localize the variables by
>
> > wrapping the contents of the merged cells in a Module. By doing so in
>
> > Mathematica 9, due to a bug in merging cells, I lost a lot of code. I
>
> > reported this bug to WRI two weeks ago. It is not yet repaired in the
>
> > new release, so I thought I would mention this annoying bug here as well.
>
> > This is an example (Mathematica 9 for Windows, I am not aware if this
>
> > happens for other systems too).
>
> > Construct two input cells, the first one containing
>
> > a=1;
>
> > (* comment *)
>
> > b=2;
>
> > and the second one
>
> > c=3;
>
> > When merging these two cells the contents ending with the comment is
>
> > shown in an orange rectangle, with the error message that there is a
>
> > RowBox with an invalid first argument. I cannot see any reason why this
>
> > merging of cells could not be undone with ctrl-Z, but it cannot and
>
> > therefore part of my code was gone.
>
> > In this simple example I could see how to fix it. Toggle ctrl-E for
>
> > seeing the box structure. Place a } just behind the RowBox with the
>
> > comment and a { behind the very first RowBox[, that is followed on the
>
> > next line with another RowBox.
>
> > During writing this message, I found that the same happens when you try
>
> > to copy and paste the first cell.
>
> > Fred Simons
>
> > Eindhoven University of Technology
>
> Same problem with Mathematica 9.0.0 under Linux x86 (64 bit).
>
> Rafael R. Pappalardo
> Univ. of Seville (Spain)






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