Thanks for your answers. Yeah, I'm using the button shader to have a comic style render, which works all the time, but the outline shader that comes with putting look bad in my opinion, so I add a geometry shell to the figures and then apply the outline shader to the geometry shell, which sometimes render without problem, and other times I have the unable to render error, which force me to close daz 3d and then close it from the task manager. Although it renders well, is frustrating that sometimes it doesn't work, that's why I wanna know if someone has the same problem. I have tried this in daz studio 4.21 and 4.12 with the same results in both versions.