[graham.hobart (Graham stevens)]

Hi, trying for the fifth time tonight to stack some DSLR frames - for the only time since having the beta version and same camera etc DSS will register and stack till it gets to the end then a little traffic cone pops up and says caution or danger or ? - then it goes back to starting all over again.
its not overly onerous-30 subs, 30 darks, 30 bias and 30 flats.
?help