diff --git a/Moose Development/Moose/Functional/RAT.lua b/Moose Development/Moose/Functional/RAT.lua
index 081132413..98e295167 100644
--- a/Moose Development/Moose/Functional/RAT.lua	
+++ b/Moose Development/Moose/Functional/RAT.lua	
@@ -5832,6 +5832,7 @@ RATMANAGER={
   rat={},
   name={},
   alive={},
+  planned={},
   min={},
   nrat=0,
   ntot=nil,
@@ -5880,6 +5881,7 @@ function RATMANAGER:Add(ratobject,min)
 
   self.rat[self.nrat]=ratobject
   self.alive[self.nrat]=0
+  self.planned[self.nrat]=0
   self.name[self.nrat]=ratobject.alias
   self.min[self.nrat]=min or 1
 
@@ -6020,11 +6022,25 @@ function RATMANAGER:_Manage()
   for i=1,self.nrat do
     for j=1,N[i] do
       time=time+self.dTspawn
-      SCHEDULER:New(nil, RAT._SpawnWithRoute, {self.rat[i]}, time)
+      self.planned[i]=self.planned[i]+1
+      SCHEDULER:New(nil, RATMANAGER._Spawn, {self, i}, time)
     end
   end
 end
 
+--- Instantly starts the RAT manager and spawns the initial random number RAT groups for each RAT object.
+-- @param #RATMANAGER self
+-- @param #RATMANAGER RATMANAGER self object.
+-- @param #number i Index.
+function RATMANAGER:_Spawn(i)
+
+  local rat=self.rat[i] --#RAT
+  
+  rat:_SpawnWithRoute()
+  self.planned[i]=self.planned[i]-1
+
+end
+
 --- Counts the number of alive RAT objects.
 -- @param #RATMANAGER self
 function RATMANAGER:_Count()
@@ -6053,7 +6069,7 @@ function RATMANAGER:_Count()
     ntotal=ntotal+n
 
     -- Debug output.
-    local text=string.format("Number of alive groups of %s = %d", self.name[i], n)
+    local text=string.format("Number of alive groups of %s = %d, planned=%d", self.name[i], n, self.planned[i])
     self:T(RATMANAGER.id..text)
   end
 
@@ -6083,9 +6099,10 @@ function RATMANAGER:_RollDice(nrat,ntot,min,alive)
   local M={}
   local P={}
   for i=1,nrat do
+    local a=alive[i]+self.planned[i]
     N[#N+1]=0
-    M[#M+1]=math.max(alive[i], min[i])
-    P[#P+1]=math.max(min[i]-alive[i],0)
+    M[#M+1]=math.max(a, min[i])
+    P[#P+1]=math.max(min[i]-a,0)
   end
 
   -- Min/max group arrays.
@@ -6102,7 +6119,7 @@ function RATMANAGER:_RollDice(nrat,ntot,min,alive)
   -- Number of new groups to be added.
   local nnew=ntot
   for i=1,nrat do
-    nnew=nnew-alive[i]
+    nnew=nnew-alive[i]-self.planned[i]
   end
 
   for i=1,nrat-1 do
@@ -6134,7 +6151,7 @@ function RATMANAGER:_RollDice(nrat,ntot,min,alive)
     end
 
     -- Debug info
-    self:T3(string.format("RATMANAGER: i=%d, alive=%d, min=%d, mini=%d, maxi=%d, add=%d, sumN=%d, sumP=%d", j, alive[j], min[j], mini[j], maxi[j], N[j],sN, sP))
+    self:T3(string.format("RATMANAGER: i=%d, alive=%d, planned=%d, min=%d, mini=%d, maxi=%d, add=%d, sumN=%d, sumP=%d", j, alive[j], self.planned[i], min[j], mini[j], maxi[j], N[j],sN, sP))
 
   end
 
@@ -6149,7 +6166,7 @@ function RATMANAGER:_RollDice(nrat,ntot,min,alive)
   -- Debug info
   local text=RATMANAGER.id.."\n"
   for i=1,nrat do
-    text=text..string.format("%s: i=%d, alive=%d, min=%d, mini=%d, maxi=%d, add=%d\n", self.name[i], i, alive[i], min[i], mini[i], maxi[i], N[i])
+    text=text..string.format("%s: i=%d, alive=%d, planned=%d, min=%d, mini=%d, maxi=%d, add=%d\n", self.name[i], i, alive[i], self.planned[i], min[i], mini[i], maxi[i], N[i])
   end
   text=text..string.format("Total # of groups to add = %d", sum(N, done))
   self:T(text)