[OS X TeX] diffps with Snow Leopard ?

[Steffen Wolfrum]

Am 11.10.2009 um 20:59 schrieb Steffen Wolfrum:
> Am 11.10.2009 um 16:29 schrieb Steffen Wolfrum:
> Am 11.10.2009 um 16:13 schrieb Herbert Schulz:
>>> On Oct 11, 2009, at 9:01 AM, Steffen Wolfrum wrote:
>>>>
>>>> it should have been more precisely: "does anybody alredy has  
>>>> successfully used under Snow Leopard?" ;o)
>>>>
>>>> When I run Michaels script I get an error:
>>>>
>>>> **** File has an unbalanced >> (close dictionary).
>>>> **** Incorrect object count in object stream.
>>>> Error: /rangecheck in resolveobjectstream
>>>>
>>>> [...]
>>>>
>>>> GPL Ghostscript 8.63: Unrecoverable error, exit code 1
>>>>
>>>> Best,
>>>> Steffen
>>>
>>> Howdy,
>>>
>>> Just tried it with MacTeX-2009 pretest (which includes Ghostscript  
>>> 8.70) on a couple of slightly different versions of a pdf file and  
>>> it seems to work fine. Oh, yes, I'm using Snow Leopard.
>>
>>
>> My negative test was made with the current MacTeX-2008  [20 March  
>> 2009 ].
>> So I am going to get and install a "MacTeX-2009 pretest" , too.
>>
>> I'll report later ...
>
>
> It works!
>
> The only error that pops up (for pages that where identified as  
> differing) is:
> "libpng warning: Invalid sBIT depth specified"
>
> I never had this warning in 10.4  and 10.5 ... What does it mean and  
> where does it come from?




One last question:

diffps requires Netpbm.

Usually I provided this by using Gerben's iinstaller choosing "Netpbm  
Tools and Library".
But now (2 1/2 years after Gerben quit it) this doesn't work anymore:  
"appendAttributedOutput: (NULL)"

So what exactly are the Netpbm components that diffps needs?
Where do I get them? How should I install them properly now?!

Thanks for any hints,
Steffen

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