Hello,

Sorry, I´m not sure if this issue is opened on the TRAC:

etoys-dev-4.0 till 2206 cs,
etoys mode,

object Curve (basic categorie) is a PolygonMorph,

an instance show a vertices count=3 by default, but if you try to modify this number the PolygonMorph does not understand makeVertices:

with "remove all vertices but cursor" sometimes I get an evaluationError and sometimes I get a PreDebugWindow also

PolygonMorphs have an intensive use from tecnologics users!

regards