diff --git a/LuaLibs/RunCalcSolids.lua b/LuaLibs/RunCalcSolids.lua
index 5aea6bf..d7fb6b4 100644
--- a/LuaLibs/RunCalcSolids.lua
+++ b/LuaLibs/RunCalcSolids.lua
@@ -116,6 +116,7 @@ local function CreateSpiralVaseSolid( nCrvId, nSolidGrp, LayerParams, dStrand)
    local dDelta = ( ptE - ptS) * LayerParams.vtSlicing
    EgtSpiralizeCurveAlongExtrusion( nCrvCopy, - dDelta)
    EgtMergeCurvesInCurveCompo( nCrvCopy)
+   EgtChangeClosedCurveStartPoint( nCrvCopy, ptS, GDB_RT.GLOB)
   
    -- calcolo la sezione
    local vtDir = EgtSV( nCrvCopy, GDB_ID.ROOT)