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Test results show this: "Save As" doesn't crash on these large files, where "save" does. (save dialog pops up twice and then Affinity Photo is gone...the file will be fully restored to its latest state after Affinity Photo reboot) (Indeed...this system runs on a UPS ;-)) RAMDISKS are nice in development environments, usually if there is really a lot of reading/writing, RAM doesn't wear out that much)

Thank you for your reply, and yes it is probaply the size of thee file, I will test also the "undo limit" (now 2048)

Why would Affinity have to develop RAMDISK software? 256 gB RAM leaves enough memory for what ever application … and developing with the use of a RAMDISK has some advantages ;-)) Sleeping (this is "power saving" mode versus "full power mode") NVM Express is descibed here: https://nvmexpress.org/resources/nvm-express-technology-features/nvme-technology-power-features/ Ofcourse Affinity supports saving on a RAMDISK, Affinity uses the OS to save data … … … The saving problem is stiil not solved (at least with > 3gB "afphoto files"), but I can live with it, and if Affinity can do so too it is fine with me.

Affinity Photo crashes on saving a large file/document (like 4gB) after a long time working on it. Affinity Photo seems to be confronted with a "sleeping disk" just before the crash … I tested with this file on a ramdisk (32 gB) which resulted in the same crash of Affinity Photo, … this disk cannot "sleep" at all … It is possible to reconstruct the file after the crash. (AMD Threadripper 3960x Windows system with 128 gB RAM and lots of space on nvme SSD disks.)

Though NVidia* suggest that "OpenCL compue accelaration" should work on my system, I can not enable this in Affinity Photo version 1.9.0.9032.** What to do? Thank you for your help in advance. For system details see *** Details: * https://www.nvidia.com/Download/driverResults.aspx/170131/en-us What’s New in Version 460 U3 Added support for NVIDIA Broadcast 1.1 Updated noise removal with more noise detection profiles Added new performance mode for virtual background, allowing higher FPS Added options to configure camera settings GPU Acceleration for Affinity Photo Adds hardware acceleration for performance improvements in pixel-based tasks, such as filter effects, adjustments, and brush tools. Added 3DXpert application profile. ** *** Machine details: OS: Windows 10 Pro 64-bit, Version 20H2, Build 19042.746 CPU: Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz 2.89 GHz (2 processors) GPU: NVIDIA Quadro K5000, BIOS 80.04.e2.00.15, Driver 461.40 (27.21.14.6140) Mem: Type DDR3, 98232 MBytes (96,0 GB), Frequency 797.8 MHZ

So no schedule / timepath for the implementation of GPGPU in the Windows v ersion at all … Weird development strategy …

A layered panorama output would give the possibility also to improve the alignment or blending in case something went wrong; next to this it would be nice to find the complete panorama stitching and blending steps back in history, so can track back, step by step, to where you want to change things and reprocess from that point on.