This would alleviate the confusion, thank you! But I agree that now is
an awkward time to push the change: many schools are just starting their
semester, and a change at this point may make some notes obsolete right
at the beginning of the semester.
My students should be ok at this point: we have sorted out the confusion
already, so no need for an upgrade on our behalf (but we will get it
once it becomes available).
Thanks!
Elena
On 9/8/2013 7:32 PM, Robby Findler wrote:
Okay, I've made a first attempt on two changes aimed at fixing these
problems.
1) change the "image.rkt" to "htdp/image.rkt" and "2htdp/image.rkt" so
there are no names that are exactly the same
2) have the teachpack dialog be sensitive to the already installed
teachpacks and give a warning when a new one would conflict with an old.
Here's a screenshot:
http://oi40.tinypic.com/v4b9l4.jpg
showing what I imagine happening when you click on the 2htdp/image.rkt
teachpack when you have the htdp/image.rkt one already installed.
(I would have pushed this already, but there are a few GUI niceties
that I want to do before pushing.)
I'm slightly worried about 1) because there may be course notes out
there that tell people "choose the image.rkt teachpack in the left
column" that would have to be changed and thus would annoy
instructors. Your opinions on this point welcome.
Robby
On Sun, Sep 8, 2013 at 2:34 PM, Elena Machkasova
<ele...@morris.umn.edu <mailto:ele...@morris.umn.edu>> wrote:
Thanks, Robby and Marco!
Yes, such things may be difficult to change - that's totally
understandable! I think a significant part of the confusion is
that these teachpacks are listed under "Pre-installed" which seems
to mean that they are already there when DrRacket is installed,
and that there are two teachpacks with the same name. Perhaps
using wording other than "pre-installed" and renaming one of the
taechpacks (if possible; I know that sometimes there are
dependencies that make it very difficult) would help.
I posted a detailed clarification for my students, and hopefully
they are all set.
And I generally don't ask them to remove teachpacks either, but
once they've added the wrong one (and many of them added both),
it's easier at this point to just clear all and add it again than
to make sure that they remove the one they should.
Thanks!
Elena
On 9/6/2013 9:49 PM, Robby Findler wrote:
Unfortunately, this is the way things work. Those are actually
two different teachpacks and the error message that you are
getting is a poorly worded "these two teachpacks conflict with
each other".
Is there perhaps some other behavior you'd prefer?
And, I should also point that even if we do find some fix, there
is little chance that our release schedule can be adjusted to
respond to your lab installation schedule, I'm sorry to say.
Robby
On Fri, Sep 6, 2013 at 9:29 PM, Elena Machkasova
<ele...@morris.umn.edu <mailto:ele...@morris.umn.edu>> wrote:
Good evening,
this may've come up before, but I looked through the last few
messages and did a bit of searching, and couldn't find
anything about this problem. My apologies if this is already
a known issue.
When DrRacket is installed, it comes with 3 pre-installed
teachpacks, including image.rkt. However, image functions
(rotate, square, etc) are undefined. Installing the teachpack
from the middle column in the "add teachpack" list fixes the
issue.
However, if the user then tries to add the teachpack and
happens to click on it in the first column, they get an error
message "module: identifier already imported from a different
source". The solution that seems to work then is to clear
both teachpacks and then install the one in the middle column.
This behavior takes place for both Racket 5.3.4 and 5.3.6,
for Windows and Linux (Fedora 18). I don't know if it's
happening on a Mac as well.
If there is a plan to fix it in the next release, could you
let me know? We might wait a couple of weeks to upgrade our
lab to 5.3.6 is we can get an upgrade with this issue fixed.
Many thanks!
Elena
University of Minnesota, Morris
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