132 Mb is really large for the SS4 software if I remember correctly. I can't speak to the SUE, but that would be a very large file for anything I've worked with.
Is there any way to break your project down into smaller regions, to see if the smaller file size made any difference?
Hopefully one of the SUE folks will be along with more concrete ideas.
MaryB
Power GeoPak 08.11.09.918Power InRoads 08.11.09.918OpenRoads Designer 2021 R2
I was going to try and merge several copies of the files and then delete everything not associated after a certain "section" of TIN reference and work my way back to something smaller or at least cut the file into a North/South section, but I haven't had any luck successfully merging the file into a blank one yet since it uses both a 2D/3D model view group setup (i'm hoping that this doesn't make it impossible). I was finally able to upload the project to ProjectWise, but I'm going through Project Explorer and looking to remove possibly profile elements showing up in my plan view that aren't needed anymore (not related to my current utility Model groups) and see if that fixes some of the issues with the memory skyrocketing when rendering.