Fixing a custom assembly that will not build

A custom assembly is built from its plan: bodies, dividers, shelves, drawers, lids, roofs, panels, cut-outs and engraving. The engine cuts every joint where two panels meet. When something cannot be made, it says which part and why instead of guessing.

Message	What it means	Fix
Panels overlap	Two panels lie in the same plane and occupy the same space, often two boxes placed into each other	Move one body, or stack it on top of the other
Goes only part way into another panel	A joint needs one panel to pass through the other's whole thickness	Ask the assistant to extend the panel to the outside face, or stop it at the inside face
Crossing panels need an edge	Two dividers cross in the middle and neither reaches an edge, so they cannot slot together	Make crossing dividers the same height
Panel falls apart / cut away	Other panels cross it so often that it splits into pieces	Fewer compartments, or a larger body
Cut-out too close	A window, hole or pull is closer than 3 mm (or the sheet thickness) to an edge or a joint	Make it smaller or move it towards the middle of the panel
Text runs past the edge	Engraved text is wider than its panel	Shorter text or a smaller size
Panel not connected	A panel does not touch anything; it would be loose	Move it to meet the panel it belongs to, or glue it by hand
Drawers need an open front	Drawers slide out of the front, so the body cannot have a front wall	The assistant opens the front automatically when you ask for drawers
Too small / out of range	A body, shelf gap, drawer or compartment is too small for the sheet thickness	Make it larger or use fewer compartments
Plan or expression errors	A measurement refers to something that does not exist, or two measurements depend on each other in a circle	Ask the assistant to fix it, or change the measurement directly
Thickness not supported	Finger and slot joints need 1.5–12 mm sheet	Use 3–6 mm plywood, MDF or acrylic

Fit is not guaranteed by a valid design

A design that passes every check fits together on screen. Whether it fits on your machine depends on the real thickness of your sheet and your cutter's kerf. Measure the sheet, enter the measured thickness, and cut one corner joint as a test before the whole project.