Crease Line in Main Outline

You get this error when the main outline of the dieline contains a crease line, like below:

This is obviously a mistake as there’s nothing to fold on the other side of the crease line.

Realistic case 1

You rarely get that error in such a clear way, so here’s a more realistic scenario:

A more realistic scenario when the crease line becomes a part of the main outline

Again this was scaled up to make the problem more obvious: the curve at the right bottom corner goes up too much and the crease line ends up under it, effectively becoming a part of the main outline.

Realistic case 2

Another possible scenario is below:

Hanging path puts the crease line to the main outline

Here the cut line at the bottom is not connected to the top part on the right. This is called a hanging element and is reported separately by Origami. Anyway, as such “hanging” lines are ignored, the crease line becomes the part of the main outline which triggers the error.

In that case there’s probably nothing wrong with the crease line itself and the hanging cut line needs to be fixed instead.

What to do?

Consider zooming and inspecting the highlighted elements. Once you find out the problem crease line, you need to either replace it with a cut or adjust the nearby paths, so the crease line stays inside the main outline of the dieline.

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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