# Revision history [back]

### frozenset error when plotting polytopes: bug?

I am having trouble understanding an error I get, when i try the following:

ngon=polytopes.regular_polygon(122).dilation(18.1)
ngon.plot()


It says: KeyError: (frozenset([60]), frozenset([60])) The following works:

ngon=polytopes.regular_polygon(122).dilation(17.9)
ngon.plot()


What is going on? Is this a bug?

 2 retagged FrédéricC 1816 ●3 ●20 ●33

### frozenset error when plotting polytopes: bug?

I am having trouble understanding an error I get, when i try the following:

ngon=polytopes.regular_polygon(122).dilation(18.1)
ngon.plot()


It says: KeyError: (frozenset([60]), frozenset([60])) The following works:

ngon=polytopes.regular_polygon(122).dilation(17.9)
ngon.plot()


What is going on? Is this a bug?