Context: I'm trying to design templates for some of the common panel shapes we manufacture. The templates are based off a 3d sketch of a box, and I use an iLogic script to snap the corners of the box to the surfaces of a derived part to adjust the size, position, and orientation in the assembly. I use 3 points from the 3d sketch to make a plane, and I create a 2D sketch on the plane, projecting the box points and making a proper 2D box for the primary face of the panel. The flanges of this primary face are expected to snap in alignment to the angles of the reference geometry of the derived part. Instead of making multiple flanges at a time with auto-mitering enabled, I'm making each flange individually so that if I need to delete or modify one, it's less painful.
Problem: Half of the time the process works as expected. The other half of the time, corners refuse to compute, and it seems to usually have problems when I try to snap flange angles. I've made sure the flanges are exactly coplanar. I've messed with all the settings of the flanges in question. It doesn't seem to matter which way I change the settings to compute the corner. Even though it's able to generate a proper preview of the feature, it fails. If I manually set the angles of certain flanges, it seems fine. but snapping to planes causes failure. I've checked the file to make sure it's not corrupted. Everything seems fine. I have constraints in the 2D sketch to ensure it's creating a perfect rectangle. Can anybody suggest a solution or some tips to make corners more predictable and stable? It's not that I can't find a way to fudge it to get exactly what I want. I can do that. I just can't figure out why it's so fussy.
I've attached the file in question. You'll have to forgive that the part is so far from the origin. It's like that because the position was based off a derived part, which is nested a few levels deep and leads to a Revit model with a far away origin. I've provided a plane to simulate what I was trying to snap to.
I'm using Inventor 2026.
@HogueOne Your post title was modified to add the product name and version and to increase findability - CGBenner
