GeoGen Script reference
GGE2801

The script finished without yielding the main height map.

If the script doesn't contain the main map yield at all, error GGE1312 is generated during compilation. This error is usually caused by the main yield being hidden in a conditional block such as if.

if(Random(0, 2) > 1)
{
yield HeightMap.Noise();
}
// GGE2801 if a number less than 1 is generated by the Random call