polyobjects, zdoom crash

When I try to play a map of mine with a polyobject in it, Zdoom gives me this message:

SpawnPolyobj: Poly 0 does not exist.

How the fuck do I know what number my polyobject is? is it the same as the sector number?

I know it's because I'm creating the polyobject wrong, but I don't know what it is I'm doing.

Afaik, the angle of the "polyobject_anchor" and the "polyobject_startspot" things
determine the number of your polyobject.

You also have to give one of the poly lines the "polyobject_start" (dunno if this is the exact name) action!

dude thank you so much.

No problem :)