Hello, I am relatively new to RTI, but have successfully used the software a few times. I keep getting stuck on the sphere detection step of my latest project, which is a highlight-based PTM fitter. I crop out the spheres, hit sphere detection, but once it's done the next button is still not click-able. I have deleted the project and restarted several times to no avail. I was able to make a highlight-based HSH fitter with the same piece. What am I doing wrong