diff --git a/LuaLibs/WProcessDrill.lua b/LuaLibs/WProcessDrill.lua
index 35037e8..e53519d 100644
--- a/LuaLibs/WProcessDrill.lua
+++ b/LuaLibs/WProcessDrill.lua
@@ -590,7 +590,7 @@ function WPD.Make( Proc, nRawId, b3Raw, bUseMultiDrill, DrillingsToAvoid)
       bOk = WPD.Make( Proc, nRawId, b3Raw, true, TriedDrillings)
       -- non trovata lavorazione, si prova con le lavorazioni singole
       if not bOk then
-         for i = 1, #Proc.SkippedGeometries do
+         for i = #Proc.SkippedGeometries, 1, -1 do
             for j = 1, #Proc.OtherGeometries do
                local AuxIdOtherGeometry = EgtGetInfo( Proc.OtherGeometries[j].Id, 'AUXID', 'i') or 0
                if AuxIdOtherGeometry then AuxIdOtherGeometry = AuxIdOtherGeometry + Proc.OtherGeometries[j].Id end
diff --git a/LuaLibs/WallExec.lua b/LuaLibs/WallExec.lua
index e68fc0f..603ce73 100644
--- a/LuaLibs/WallExec.lua
+++ b/LuaLibs/WallExec.lua
@@ -1099,7 +1099,7 @@ function GetFeatureInfoAndDependency( vProc)
          -- se non è la stessa feature
          if Proc.Id ~= ProcB.Id then
             -- raggruppamento fori per eventuale Multidrill
-            if Drill.Identify( Proc) and Proc.Flg ~= 0  and  Drill.Identify( ProcB) and ProcB.Flg ~= 0 then
+            if WD.USE_MULTI_DRILL and Drill.Identify( Proc) and Proc.Flg ~= 0  and  Drill.Identify( ProcB) and ProcB.Flg ~= 0 then
                if not Proc.OtherGeometries then
                   Proc.OtherGeometries = {}
                end