I have had this same error for 10 plus runs, changing forces, removing some forces, inspecting supports, changing force values, changing topology optimization material removal percentages. I use maximize stiffness. I have used this in the past, with very similar setup and have never had this problem. I understand what it is saying, but it is not apparent to me why it thinks the model is unbounded by supports or loads. I will upload the stmod file to hopefully have someone look at this for me and explain why it didn't work. https://drive.google.com/file/d/1MPdmQ3HR6U9F9NFhmWoSDb_7vlr_73ju/view?usp=drive_link.
This is a google drive link to the file because the file upload thing on the question form was too small for the file size.
