On 8/29/2013 10:15 AM, Hans Hagen wrote:
> On 8/29/2013 4:06 AM, Aditya Mahajan wrote:
>> Hi,
>>
>> I am trying to pick up on an old thread of creating an overview page
>> [1]. Basically, the idea is to create an overvew slide at the end of a
>> presentation that shows the first page of different sections in a
>> presentation. Based on Wolfgang's answer in that old thread, I save the
>> relevant pages in a box, and then display them again at the end of the
>> presentation.
>>
>> This works, except that I get a series of warnings:
>>
>> l.86 \placeoverviewpage
>>                       LuaTeX warning (ext4): destination with the same
>> identifier (name{aut:10}) has been already used, duplicate ignored
>>
>> How do I get rid of these?
>
> Tricky. The problem is that you flush a box (copy) so the message comes
> from deep inside the backend (for good reason) and so we cannot
> intercept it as "hey user, you use the same dest twice" simply because
> it's a copy and not re-rendered.
>
> There are two solutions:
>
> (1) strip the box before copying (i can make a helper for that - later
> as i have to go now): destinations, references, writes-to-lists etc
>
> (2) you copy the old file before processing and use that one
>
>   \def\placeoverviewpage
>     {\startstandardmakeup[\c!align=\v!middle]
>         \getfiguredimensions[temp.pdf]%
>
> \dorecurse{\noffigurepages}{\externalfigure[temp.pdf][\c!page=##1,\c!width=\overviewwidth]\relax\space}
>
>      \stopstandardmakeup}
>
>> I am afraid that I cannot create a small example illustrating this
>> warning, so I am attaching the complete test file.
>>
>> [1]: http://thread.gmane.org/gmane.comp.tex.context/72556/focus=72571
>
> [2] It has always been a wish of mine to have it as option in the engine
> (pdfetex) but in luatex it's not that hard to do it myself now (i
> already have a stripper so I can extend that one a bit).

attached ... you can run the module for an example (you need a new beta)


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