Problem with Abstract Tree Apple Sample code

Hi,

I have downloaded Apple's demo project Abstract Tree which uses
the Core Data system and XCode 3.0 (under 10.5.1) and can compile and
debug this on one machine, a G4 Powerbook but when I try to debug on
my Dual Core G4 desk top (also under 10.5.1 and XCode 3.0) it fails to
start up with the following message

dyld: lazy symbol binding failed: Symbol not found:
__cg_png_create_read_struct
Referenced from: /System/Library/Frameworks/
ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/
Versions/A/ImageIO
Expected in: /usr/local/lib/libPng.dylib

I have checked and I have the same version of iibPng.dylib on both
machines (same file size and same date).

Any suggestions on what else to check/change ?

Also a quick web search for __cg_png_create_read_struct yields a few
people with graphics programs like GRASS and TexShop having this same
problem.

--jim

Fixed it.

NOTE: All of this is complicated by the fact that I had put
WireShark on the machine and had to update X-11 from the stock OS X
version. Anyway I found that if you do the following:

cd /usr/local/lib

sudo mv libtiff.dylib old_libtiff.dylib
sudo mv libpng.dylib old_libpng.dylib

That fixes this problem and it also fixed the problem I had that
gnuplot, which had stopped working as it had a problem with the
libtiff.dylib in /usr/lib/local. There when I tried a plot it died as
it was missing a function in that library.

--jim