Tech@ZWO This problem only occurs on a few images and with seemingly no change to the equipment such as a meridian flip or high winds to move the cabling. I've replaced power supply with a couple of different ZWO 12vdc 5amp power supplies. My setup uses an ASIAIR Plus, AM5 mount, and 6200 MM Pro camera. I've tried power supplied directly to the camera, from the AM5, and from the ASIAIR plus.
I've swapped USB cables before to resolve the 'exposure failure' problem.
The exposure time is 300s and this has occurred on different filters (EFW inline).
I have reset the firmware to see if that helps. I'll likely get some imaging time in tonight to see if the issue reoccurs, though it isn't a consistent problem. Even when the problem does occur, it may resolve itself in 10 - 15 exposures (or not).
Besides the possibility of resolving a strange software bug via a firmware update, I thought perhaps this is due to the warming weather in my area? Nights are around 21 to 15C and I've set the camera to cool to -14. This may be excessive and causing the problem due to overheating or something.
The suggestion that this may simply be due to how the file is being viewed was a good one, though I've confirmed that the exposure is completely white across all pixels so it seems more like a software problem.
I'll try reducing the cooling on the camera and the firmware has been reset. If that doesn't work, I'll try using ASIStudio. This is more difficult since I need to be with the equipment. If there is an imaging log somewhere I can get to when this problem next occurs, I would be happy to provide that.