I have already successfully done hundreds or even thousands of scans. But, for the past few weeks, I have systematically had missing shares in the reconstruction. So, I retry again and again and sometimes it works and my scan finishes successfully. Other times, I change the position (15° pivot for example) and the size of the box. I’m amazed to have these same missing PART issues on totally different projects. As a result, I manage to finish the scans but it takes a lot of time.