I am having trouble rendering this scene, I have removed as much geometry as I can! also tried copying and pasting into another scene, it wont let me render just a 1200 x 600 image. Can anyone see anything that's wrong? you can download the file from here.
it's the Subdivision Surface above the Spline Wrapped Bubble Tubing, turn it off - the Bubble Sweep is already very smooth - if the Wire Mold Sweep needs to be smoothed either remake it with more sides to the n-side or change as is from Linear to BSpline or something