diff --git a/LuaLibs/CalcToolPath.lua b/LuaLibs/CalcToolPath.lua
index f59df84..446a9b8 100644
--- a/LuaLibs/CalcToolPath.lua
+++ b/LuaLibs/CalcToolPath.lua
@@ -2630,8 +2630,8 @@ local function SpiralVasePartialMultiPlanar( vLayIds, LayerParams)
             local ptSOld = EgtSP( nOldId, GDB_ID.ROOT)
             local ptEOld = EgtEP( nOldId, GDB_ID.ROOT)
             -- proiezione ortogonale dei punti sul piano di slicing corrente
-            local ptSProj = ptSOld + ( ( ptSOld - ptSlicing) * vtSlicing) * vtSlicing
-            local ptEProj = ptEOld + ( ( ptEOld - ptSlicing) * vtSlicing) * vtSlicing
+            local ptSProj = ptSOld - ( ( ptSOld - ptSlicing) * vtSlicing) * vtSlicing
+            local ptEProj = ptEOld - ( ( ptEOld - ptSlicing) * vtSlicing) * vtSlicing
 
             -- a) continuità tra i layers 
             -- modifico il punto iniziale corrente per avvicinarmi il più possibile alla fine del percorso precedente
diff --git a/LuaLibs/RunCalcSolids.lua b/LuaLibs/RunCalcSolids.lua
index de00809..d5b991a 100644
--- a/LuaLibs/RunCalcSolids.lua
+++ b/LuaLibs/RunCalcSolids.lua
@@ -24,7 +24,7 @@ local function GetLayerParamsForSolidCalc( nPartId)
    local LayerParams = {}
    LayerParams.bSpiralVase = EgtGetInfo( nPartId, KEY_SPIRAL_VASE, 'b') or false
    LayerParams.dLayHeight = EgtGetInfo( nPartId, KEY_SLICE_STEP, 'd')
-   LayerParams.vtSlicing = EgtGetInfo( nPartId, KEY_SLICE_DIR, 'v')
+   LayerParams.vtSlicing = EgtGetInfo( nPartId, KEY_SLICE_DIR, 'v') or EgtGetInfo( nPartId, 'SlicingDir', 'v')
    LayerParams.dStrand = EgtGetInfo( nPartId, KEY_STRAND, 'd')
    return LayerParams
 end
diff --git a/LuaLibs/RunPrepareExport.lua b/LuaLibs/RunPrepareExport.lua
index bf061c8..f79e687 100644
--- a/LuaLibs/RunPrepareExport.lua
+++ b/LuaLibs/RunPrepareExport.lua
@@ -156,7 +156,7 @@ function RunPrepareExport.Exec()
    -- recupero alcune info utili e le assegno al punto per poterle leggere da ThreeJS
    local dH = EgtGetInfo( nPartId, KEY_SLICE_STEP, 'd')
    EgtSetInfo( nPnt, KEY_SLICE_STEP, dH)
-   local vtSlicing = EgtGetInfo( nPartId, KEY_SLICE_DIR, 'v')
+   local vtSlicing = EgtGetInfo( nPartId, KEY_SLICE_DIR, 'v') or EgtGetInfo( nPartId, "SlicingDir", 'v')
    EgtSetInfo( nPnt, "SlicingDir", vtSlicing)
    local bSpiralVase = EgtGetInfo( nPartId, KEY_SPIRAL_VASE, 'b') or false
    EgtSetInfo( nPnt, KEY_SPIRAL_VASE, bSpiralVase)
diff --git a/Version.lua b/Version.lua
index 9c9718f..d21def6 100644
--- a/Version.lua
+++ b/Version.lua
@@ -1,4 +1,4 @@
 -- Version.lua by Egaltech s.r.l. 2026/03/04
 -- Gestione della versione di 3dPrinting
 
-VERSION = '3.1c1'
\ No newline at end of file
+VERSION = '3.1c2'
\ No newline at end of file