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[hvdwolf <717944@xxxxxxxxxxxxxxxxxx>]

I can confirm this behavior of cpfind on Mac, for the 2010.4 as well as newer builds. The cpfind in 2010.4 is only 32bits. There is no 64bits version as the 64bit versions segfaulted on startup.
Quite a few improvements have been added to cpfind and I built a 64bit cpfind again, but it's not in any Hugin bundle yet.
However, when trying to use the 64bit version it never works. Not on small images and neither on big/huge images (currently a set of 13678x9394 images).
The 64bit cpfind always segfaults, no longer on startup, but now during processing the images. I only choose 2 images to make it as simple as possible.

Some remarks: 
- the 32bit binaries are always built to be able to run on Tiger (OSx 10.4). Tiger was known to have a "weak"  implementation of malloc and mmap. The 64bit version is built to run on Leopard (10.5) and newer as Tiger doesn't support 64bit. Leopard and newer are supposed to have ccorrect implementations of malloc and mmap.
- cpfind versions are still built against the internal Zthread library.

I have added a crash log from the 64bit cpfind. I can't deduct anything
from it. Hopefully you can.

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https://bugs.launchpad.net/bugs/717944

Title:
  cpfind memory allocation error

Status in Hugin - Panorama Tools GUI:
  Confirmed

Bug description:
  On running cpfind with 12 16-bit TIFF files, each 5616x3744, cpfind is
  crashing as follows.   Perhaps it should have an option to downsample
  further or do so automatically.   I'm running on a mac with 32GBytes
  of RAM.


  ThreadQueue created
  Hugins cpfind 2010.4.0 built by Harry van der Wolf
  based on Pan-o-matic by Anael Orlinski

  Input file        : /var/folders/8h/8hlpRcCCEaGFmRb8QB9D-E+++TI/-Tmp-/ap_inprojFJqZwc
  Output file       : /var/folders/8h/8hlpRcCCEaGFmRb8QB9D-E+++TI/-Tmp-/ap_resTLTV9P
  Number of CPU     : 8

  Input image options
    Downscale to half-size : yes
  Gradient based description
  Sieve 1 Options
    Width : 10
    Height : 10
    Size : 50
    ==> Maximum keypoints per image : 5000
  KDTree Options
    Search steps : 40
    Second match distance : 0.15
  Matching Options
    Mode : All pairs
    Distance threshold : 25
  RANSAC Options
    Iterations : 1000
    Distance threshold : 25
  Sieve 2 Options
    Width : 5
    Height : 5
    Size : 2
    ==> Maximum matches per image pair : 50
  User thread created.
  Reference thread created.
  1 reference-thread added.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...
  User thread created.
  pollPendingThreads()
  1 user-thread added.
  Thread starting...

  Project contains the following images:
  Image 0
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0182.tif
    Remapped : yes
  Image 1
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0183.tif
    Remapped : yes
  Image 2
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0185.tif
    Remapped : yes
  Image 3
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0186.tif
    Remapped : yes
  Image 4
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0187.tif
    Remapped : yes
  Image 5
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0188.tif
    Remapped : yes
  Image 6
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0189.tif
    Remapped : yes
  Image 7
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0190.tif
    Remapped : yes
  Image 8
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0191.tif
    Remapped : yes
  Image 9
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0192.tif
    Remapped : yes
  Image 10
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0184.tif
    Remapped : yes
  Image 11
    Imagefile: /Volumes/Adams/Users/bst/Desktop/Hugin Export/_MG_0193.tif
    Remapped : yes

  --- Analyze Images ---
  i0 : Load image...
  i1 : Load image...
  i2 : Load image...
  i3 : Load image...
  i4 : Load image...
  i5 : Load image...
  i6 : Load image...
  i7 : Load image...
  i5 : Remap image...
  i6 : Remap image...
  i1 : Remap image...
  i3 : Remap image...
  i7 : Remap image...
  i4 : Remap image...
  i2 : Remap image...
  i0 : Remap image...
  i2 : Convert to greyscale double...
  i5 : Convert to greyscale double...
  i3 : Convert to greyscale double...
  i2 : Build integral image...
  i5 : Build integral image...
  i3 : Build integral image...
  i2 : Build distance map...
  i3 : Build distance map...
  i4 : Convert to greyscale double...
  i5 : Build distance map...
  i4 : Build integral image...
  i4 : Build distance map...
  i6 : Convert to greyscale double...
  i2 : Find keypoints...
  i3 : Find keypoints...
  i5 : Find keypoints...
  i6 : Build integral image...
  i7 : Convert to greyscale double...
  i6 : Build distance map...
  i7 : Build integral image...
  i4 : Find keypoints...
  i7 : Build distance map...
  i0 : Convert to greyscale double...
  i1 : Convert to greyscale double...
  i0 : Build integral image...
  i1 : Build integral image...
  i6 : Find keypoints...
  i0 : Build distance map...
  i1 : Build distance map...
  i7 : Find keypoints...
  i0 : Find keypoints...
  i1 : Find keypoints...
  i5 : Found 42196 interest points.
  i5 : Filtering keypoints...
  i5 : Kept 2400 interest points.
  i5 : Make keypoint descriptors...
  i5 : Build KDTree...
  i5 : Freeing memory...
  i8 : Load image...
  i3 : Found 47339 interest points.
  i3 : Filtering keypoints...
  i3 : Kept 2400 interest points.
  i3 : Make keypoint descriptors...
  i3 : Build KDTree...
  i3 : Freeing memory...
  i9 : Load image...
  An error happened while loading image : caught exception: std::bad_alloc
  i10 : Load image...
  An error happened while loading image : caught exception: std::bad_alloc
  i11 : Load image...
  An error happened while loading image : caught exception: std::bad_alloc
  cpfind(68746,0xb0081000) malloc: *** mmap(size=252317696) failed (error code=12)
  *** error: can't allocate region
  *** set a breakpoint in malloc_error_break to debug
  cpfind(68746,0xb0081000) malloc: *** mmap(size=252317696) failed (error code=12)
  *** error: can't allocate region
  *** set a breakpoint in malloc_error_break to debug
  cpfind(68746,0xb0081000) malloc: *** mmap(size=252317696) failed (error code=12)
  *** error: can't allocate region
  *** set a breakpoint in malloc_error_break to debug
  i2 : Found 40564 interest points.
  i2 : Filtering keypoints...
  i2 : Kept 2398 interest points.
  i2 : Make keypoint descriptors...
  i2 : Build KDTree...
  i2 : Freeing memory...
  i8 : Remap image...
  i4 : Found 45658 interest points.
  i4 : Filtering keypoints...
  i4 : Kept 2400 interest points.
  i4 : Make keypoint descriptors...
  i4 : Build KDTree...
  i4 : Freeing memory...
  i1 : Found 47289 interest points.
  i1 : Filtering keypoints...
  i6 : Found 49432 interest points.
  i6 : Filtering keypoints...
  i7 : Found 49374 interest points.
  i7 : Filtering keypoints...
  i6 : Kept 2358 interest points.
  i6 : Make keypoint descriptors...
  i1 : Kept 2400 interest points.
  i1 : Make keypoint descriptors...
  i0 : Found 44658 interest points.
  i0 : Filtering keypoints...
  i7 : Kept 2350 interest points.
  i7 : Make keypoint descriptors...
  i0 : Kept 2400 interest points.
  i0 : Make keypoint descriptors...
  i6 : Build KDTree...
  i1 : Build KDTree...
  i6 : Freeing memory...
  i7 : Build KDTree...
  i1 : Freeing memory...
  i7 : Freeing memory...
  i0 : Build KDTree...
  i0 : Freeing memory...

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