Topology: st_newedgessplit(..) don't seem work as expected

[aperi2007]

Hi, I try this code:

select topology.AddEdge('schema_topo',ST_GeomFromEWKT('SRID=3003;LINESTRING(1 4, 4 4, 5 5)')); select topology.ST_NewedgesSplit('schema_topo',1, ST_GeomFromEWKT('SRID=3003;LINESTRING(4 7, 4 4)'));

Having this error:

[Errore] Righe script: 1-35 ------------------------

ERROR: SQL/MM Spatial exception - point not on edge Riga: 1

[aperi2007]

oops,

wrong geometry.

sorry for noise.