Elements Are Too Small
You might get this warning if your dieline path looks like this:

Each of these small elements must be analyzed, converted to straight segments and then transferred to 3D mesh. Besides being time and CPU consuming this also applies to cutting real paper, as all those little cuts must be done there, too.
Consider analyzing all the locations Origami highlights and check if you really need those extra vertices there. Simplifying the paths helps removing the warning and usually makes the dieline better.
Want More Hints?
- Almost Vertical/Horizontal — crease line is probably misaligned;
- Broken Shape — shape is broken apart when folding;
- Path Is Not Closed — the dieline needs a solid, continuous outline path;
- Crease Line In Main Outline — the main outline must be made of cuts;
- Intersecting Curved Cuts — it might not be easy;
- Empty Layout — why there is no dieline visible?
- Hanging Element — what if a path goes nowhere?
- Impossible Crease Line — a crease that shouldn't be;
- Inconsistent Crease Lines — similar crease lines must have same angles;
- Invalid Crease — crease lines have limitations;
- Overlapping Lines — cut and crease lines must not overlap, as well;
- Separate Element — the dieline should come in one piece;
- The Points Are Too Close — avoid crowded spaces;
- Z-Fighting — what to do with overlapping polygons.
There's more from the older folding engines:
- Intersecting Holes — holes must not overlap;
- Impossible Shape — some shapes simply don’t exist;
- Outside Hole — all holes must be inside the outline path;
- Misaligned Elements — ends must meet, perfectly;
- Elements Are Too Small — keep dieline paths simple;
- Triangulation Failed — Origami fails to make a 3D mesh of a dieline.
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