Rendering and morphing doubts

ric.mastronardi_b13092c4c4

Hello everyone!
I've started using Daz a little while ago, and I've been trying to build a two characters scene.
I thought to create the two characters in different scenes, and then make use of the Merge option.
Problem is, after the merge I can't seem to render the scene with the Delight Engine (while it works with OpenGL): it stops at "Optimizing Images".
I know for sure that my first character renders properly, while I haven't tried to render the second one before merging the two scenes. I've tried to delete any of the two characters and the result remains the same. I've got the feeling that merging somehow corrupted my scene... Any idea on how to solve this?

On another topic, anyone knows how to save a morph presets that is over the limits of a certain character? It seems like every option in daz just clips the morph at the character's limits.

Using Daz 4.0.3 with an AMD Radeon HD6770.