I am using AutopanoGiga 64 bit v2.6.4 on a Windows 7 64bit machine with 8GB of RAM.

I am experiencing a lot of crashes of Autopano when  rendering an HDR image (in the warping phase).

My General settings are:
Memory Used: 3.69 GB (100% of free memory)
Cache division: Auto
Multi Core: 8 (Core i7-3770 CPU @♣ 3.40Ghz)
GPU Processing: Enable

Workflow is to detect a panorma from braketed images and render it as HDR 32bit image:

I have tested with small panorama and all is ok, but using larger set of images APG crashes generating an error: 0x0000005 Access violation reading location ...

I read the other posts in the forum about this tye of error suggesting to disable antivirus and GPU processing, I have done both without any result (antivirus is Norton, GPU is nVidia  GeForce GTX 460 with the most recent driver).

I have done some testing using the same pano project and changing "Memory Used" and  "Output Size "parameters.

The project is composed of 210 images (Tiff 16bit, 3008x200pix) in stack of 5 bracketed images, output size of the pano 15568x7784 pix (121 Mpix)

I have noticed that crashes are sure if I try to stitch a 100% resolution output HDR, and become less frequent if I reduce the output size to 50% or less (but sometimes still happen).

I have tested reducing the amount of memory used to about 2.5GB without any significant positive result.

If I stitch the same pano avoiding braketed inputs and producing a 100% resolution PSD 16bit image, all is OK.

Please help.
Marco