diff --git a/LuaLibs/BeamExec.lua b/LuaLibs/BeamExec.lua
index 836f28e..adcf5e9 100644
--- a/LuaLibs/BeamExec.lua
+++ b/LuaLibs/BeamExec.lua
@@ -2427,15 +2427,16 @@ function BeamExec.ProcessAlternatives( PARTS)
                table.insert( vProcHeadTail, TailCut)
 
                -- aggiornamento info testa/coda per Nesting
+               local sBitIndexCombinationWithInvert = BestCombination.sBitIndexCombination .. EgtIf( BestCombination.bPartInCombiIsInverted, '_INV', '')
                local HeadcutInfo, TailcutInfo = GetHeadTailInfoForNesting( HeadCut, TailCut, PARTS[nPart])
                if HeadcutInfo then
-                  PARTS[nPart].HeadcutInfo[nRotHeadCut+nOffsetIndex] = {
+                  PARTS[nPart].HeadcutInfo[sBitIndexCombinationWithInvert] = {
                      OffsetX = HeadcutInfo.OffsetX,
                      vtN = HeadcutInfo.vtN
                   }
                end
                if TailcutInfo then
-                  PARTS[nPart].TailcutInfo[nRotSplitCut+nOffsetIndex] = {
+                  PARTS[nPart].TailcutInfo[sBitIndexCombinationWithInvert] = {
                      OffsetX = TailcutInfo.OffsetX,
                      vtN = TailcutInfo.vtN
                   }
@@ -2596,15 +2597,14 @@ function BeamExec.ProcessAlternatives( PARTS)
    BEAM.INFONGEPART = {}
    table.insert( BEAM.INFONGEPART, 'INITIALPOSITION=' .. PARTS[nPart].nInitialPosition)
    for i = 1, #AlternativesNest2D do
-      local sRotation = BeamLib.ConvertBitIndexToRotationIndex( AlternativesNest2D[i])
       if PARTS[nPart].HeadcutInfo then
-         local sOffsetX = table.concat( PARTS[nPart].HeadcutInfo[sRotation].OffsetX, ',')
-         local sVtN = ( tostring( PARTS[nPart].HeadcutInfo[sRotation].vtN)):gsub("^%(", ""):gsub("%)$", "")
+         local sOffsetX = table.concat( PARTS[nPart].HeadcutInfo[AlternativesNest2D[i]].OffsetX, ',')
+         local sVtN = ( tostring( PARTS[nPart].HeadcutInfo[AlternativesNest2D[i]].vtN)):gsub("^%(", ""):gsub("%)$", "")
          table.insert( BEAM.INFONGEPART, 'ALT' .. AlternativesNest2D[i].. '_H' .. '=' .. sOffsetX .. ';' .. sVtN )
       end
       if PARTS[nPart].TailcutInfo then
-         local sOffsetX = table.concat( PARTS[nPart].TailcutInfo[sRotation].OffsetX, ',')
-         local sVtN = ( tostring( PARTS[nPart].TailcutInfo[sRotation].vtN)):gsub("^%(", ""):gsub("%)$", "")
+         local sOffsetX = table.concat( PARTS[nPart].TailcutInfo[AlternativesNest2D[i]].OffsetX, ',')
+         local sVtN = ( tostring( PARTS[nPart].TailcutInfo[AlternativesNest2D[i]].vtN)):gsub("^%(", ""):gsub("%)$", "")
          table.insert( BEAM.INFONGEPART, 'ALT' .. AlternativesNest2D[i] .. '_T' .. '=' .. sOffsetX .. ';' .. sVtN)
       end
    end