diff --git a/LuaLibs/ProcessLongDoubleCut.lua b/LuaLibs/ProcessLongDoubleCut.lua
index 969121f..374efa6 100644
--- a/LuaLibs/ProcessLongDoubleCut.lua
+++ b/LuaLibs/ProcessLongDoubleCut.lua
@@ -1,4 +1,4 @@
--- ProcessLongDoubleCut.lua by Egaltech s.r.l. 2020/12/04
+-- ProcessLongDoubleCut.lua by Egaltech s.r.l. 2021/02/06
 -- Gestione calcolo doppio taglio longitudinale per Travi
 
 -- Tabella per definizione modulo
@@ -489,7 +489,7 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
          return false, sErr
       end
       -- se angolo compreso è inferiore ai 90 gradi do errore
-      if dAng < - ( 90 + 10 * GEO.EPS_SMALL) then 
+      if dAng and dAng < - ( 90 + 10 * GEO.EPS_ANG_SMALL) then 
          local sErr = 'Error : Impossible use a mill with angle less than 90'
          EgtOutLog( sErr)
          return false, sErr