alice-teacher Error with dummy objects in Alice 2

[Susan Rivas]

Hi Emily,
Here's my opinion:
I would not have the student start over. Just delete "All references" and
select "OK" at the part where the Dummy is, from the Object Tree, and have
your student do only that part again. You will notice the "empty"
places/null set  where you can just select the new items from, so that the
only code that is eliminated, is the code with the error, or the item that
you can no longer see; then you will replace it with the objects that you
can see.

Hope that helps. Good-luck!

Take care,
Susan

On Thu, Mar 31, 2016 at 12:44 PM, EMILY REED via alice-teachers <
alice-teachers at lists.andrew.cmu.edu> wrote:

> My students are working on the Treasure Hunt tutorial where they learn
> about scene changes.  One student missed the step where it has you drop a
> dummy object at the camera and is now trying to go back and fix it.  When
> he tries to add it in, he's getting an error message saying there is
> already an object in the world named Dummy Object, but we can't find
> anything like that in his object tree.
>
> Does anyone have a solution or suggestion?  I hate to see him have to
> start over as he's already worked on it for two days.
>
> I'm attaching his world to this e-mail.
>
> Thanks in advance,
>
>
> Emily Reed
> Business Teacher, Collinsville High School
>
>
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-- 
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Susan Rivas
Shoreline Middle School
855 17th Avenue
Santa Cruz, CA 95062
(831)475-6565 ext. 214

http://www.srivas-computerlab.com
http://srivas-computerlab.com/spanish/spanish.html
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