Hi, I have a similar problem. I'm using W8-64 on a Lenovo T430 with 8GByte Memory. Image Integration for bias and darks only works for less then about 90 raw files (6000x4000, files from a Nikon 5300). With flats and lights the problem even occurs earlier. For my tests I always have rebooted the computer.
In some test runs PI (1.08.03.1123) gave the message that there is not enough memory available, but PI was not usable anylonger, in other cases it simply rebooted the computer.
I have attached a screenshot, which documents the memory usage before and after the above mentioned message appeared. Commit Charge steadily increases until PI refuses to work.
Any ideas?
Greetings from Cologne, Germany.