diff --git a/API/events/eventManager.m b/API/events/eventManager.m
index 28155865b..37243a033 100644
--- a/API/events/eventManager.m
+++ b/API/events/eventManager.m
@@ -26,6 +26,8 @@ function setEvents(value)
             persistent events
             
             if isempty(events) 
+                % Events are stored in a 3 column cell containing the ID,
+                % event type and callback for the event.
                 events =  cell(0, 3);
             end
 
@@ -36,6 +38,15 @@ function setEvents(value)
             value = events;
         end
         
+        function state=hasEvent(event_type)
+            
+            state = false;
+            events = eventManager.getEvents();
+            if any(find([events{:, 2}] == event_type, 1))
+                state = true;
+            end
+        end
+
         function funcID = getCallbackID(callback)
             % Generates a id for a callback handle function
             %
diff --git a/API/events/hasPlotHandler.m b/API/events/hasPlotHandler.m
new file mode 100644
index 000000000..10b56fa9d
--- /dev/null
+++ b/API/events/hasPlotHandler.m
@@ -0,0 +1,32 @@
+function state = hasPlotHandler()
+    % Checks if a function is listening for the plot event 
+    %
+    % state = hasPlotHandler();
+    persistent helper;
+
+    initialised = false;
+    state = false;
+    coder.extrinsic('eventManager.hasEvent')
+    if coder.target('MATLAB') || coder.target('MEX')
+        if eventManager.hasEvent(coderEnums.eventTypes.Plot)
+            state = true;
+        end
+    else       
+        coder.cinclude('eventHelper.hpp');
+        coder.updateBuildInfo('addLinkFlags','-ldl');
+        if isempty(helper)       
+            % Declaration for coder
+            helper = coder.opaque('eventHelper','NULL','HeaderFile','eventHelper.hpp');
+    
+            % Make an instance 
+            helper = coder.ceval('eventHelper');
+            path = [getenv('RAT_PATH'), 0];
+            coder.ceval('std::mem_fn(&eventHelper::init)', helper, path);
+        end
+        
+        initialised = coder.ceval('std::mem_fn(&eventHelper::isInitialised)', helper);
+        if initialised
+            state = coder.ceval('std::mem_fn(&eventHelper::hasPlotHandler)', helper);
+        end
+    end
+end
diff --git a/API/events/triggerEvent.m b/API/events/triggerEvent.m
index 4e458be4a..7fe8ecd49 100644
--- a/API/events/triggerEvent.m
+++ b/API/events/triggerEvent.m
@@ -60,11 +60,6 @@ function triggerEvent(eventType, varargin)
             elseif eventType == coderEnums.eventTypes.Progress
                 coder.ceval('std::mem_fn(&eventHelper::updateProgress)', helper, [varargin{1},0], varargin{2});
             elseif eventType == coderEnums.eventTypes.Plot
-                hasPlotHandler = coder.ceval('std::mem_fn(&eventHelper::hasPlotHandler)', helper);
-                if ~hasPlotHandler
-                    return;
-                end
-
                 result = varargin{1};
                 problemStruct = varargin{2};
                 subRoughs = result.contrastParams.subRoughs;
diff --git a/cppDeploy.m b/cppDeploy.m
index acaf49d54..25fa0678d 100644
--- a/cppDeploy.m
+++ b/cppDeploy.m
@@ -12,5 +12,5 @@
 
 % Clean up
 delete 'compile/fullCompile/deploy.zip' 'compile/fullCompile/cppDeploy/buildInfo.mat'...
-       'compile/fullCompile/cppDeploy/rtw_proj.tmw' 'compile/fullCompile/cppDeploy/defines.txt'
-       'compile/fullCompile/cppDeploy/RATMain.a';
+       'compile/fullCompile/cppDeploy/rtw_proj.tmw' 'compile/fullCompile/cppDeploy/defines.txt'...
+       'compile/fullCompile/cppDeploy/RATMain.a' 'compile/fullCompile/cppDeploy/RATMain.lib';
diff --git a/minimisers/DE/deopt.m b/minimisers/DE/deopt.m
index a49e9e708..026cd8a34 100644
--- a/minimisers/DE/deopt.m
+++ b/minimisers/DE/deopt.m
@@ -112,6 +112,8 @@
 I_refresh    = S_struct.I_refresh;
 I_plotting   = S_struct.I_plotting;
 
+doPlotEvent = hasPlotHandler();
+
 %-----Check input variables---------------------------------------------
 if (I_NP < 5)
    I_NP=5;
@@ -343,8 +345,10 @@
      end
     
      % Trigger the output event...
-     if rem(I_iter, controls.updatePlotFreq) == 0
+     if doPlotEvent && rem(I_iter, controls.updatePlotFreq) == 0
+        controls.calcSLD = true;
         [~,result] = fname(FVr_bestmem,problem,controls);
+        controls.calcSLD = false;
         triggerEvent(coderEnums.eventTypes.Plot, result, problem);
      end
     
@@ -366,9 +370,11 @@
     triggerEvent(coderEnums.eventTypes.Message, ...
                      sprintf('Iteration: %g,  Best: %f,  fWeight: %f,  F_CR: %f,  I_NP: %g\n\n', I_iter-1,S_bestval.FVr_oa(1),fWeight,F_CR,I_NP));
 end
-if rem(I_iter-1, controls.updatePlotFreq) ~= 0
+if doPlotEvent && rem(I_iter-1, controls.updatePlotFreq) ~= 0
    % This should ensure the final result is always plotted irrespective of update frequency
+   controls.calcSLD = true;
    [~,result] = fname(FVr_bestmem,problem,controls);
+   controls.calcSLD = false;
    triggerEvent(coderEnums.eventTypes.Plot, result, problem);
 end
 end
diff --git a/minimisers/simplex/fMinSearch.m b/minimisers/simplex/fMinSearch.m
index 2df5cd6ae..d843d86c2 100644
--- a/minimisers/simplex/fMinSearch.m
+++ b/minimisers/simplex/fMinSearch.m
@@ -63,7 +63,6 @@
 tolf = optimget(options,'TolFun',defaultopt,'fast');
 maxfun = optimget(options,'MaxFunEvals',defaultopt,'fast');
 maxiter = optimget(options,'MaxIter',defaultopt,'fast');
-funValCheck = strcmp(optimget(options,'FunValCheck',defaultopt,'fast'),'on');
 
 switch dis      % Changed from TMW fminsearch
     case {'notify','notify-detailed'}
@@ -85,20 +84,10 @@
 % Convert to function handle as needed.
 % funfcn = fcnchk(funfcn,length(varargin));
 % Add a wrapper function to check for Inf/NaN/complex values
-controls = varargin{2};
 problemStruct = varargin{1};
-if funValCheck
-    % Add a wrapper function, CHECKFUN, to check for NaN/complex values without
-    % having to change the calls that look like this:
-    % f = funfcn(x,varargin{:});
-    % x is the first argument to CHECKFUN, then the user's function,
-    % then the elements of varargin. To accomplish this we need to add the 
-    % user's function to the beginning of varargin, and change funfcn to be
-    % CHECKFUN.
-    varargin = [{funfcn}, varargin];
-    funfcn = @checkfun;
-end
-% 
+controls = varargin{2};
+params = varargin{3};
+doPlotEvent = hasPlotHandler();
 n = numel(x);
 
 % Initialize parameters
@@ -112,7 +101,11 @@
 v = zeros(n,n+1); fv = zeros(1,n+1);
 v(:,1) = xin;    % Place input guess in the simplex! (credit L.Pfeffer at Stanford)
 x(:) = xin;    % Change x to the form expected by funfcn
-[fv(:,1), result] = funfcn(x,varargin{:});
+if doPlotEvent
+    controls.calcSLD = true;
+end
+[fv(:,1), result] = funfcn(x, problemStruct, controls, params);
+controls.calcSLD = false;
 func_evals = 1;
 itercount = 0;
 coder.varsize('how',[1 Inf],[0 1]);
@@ -164,7 +157,9 @@
 %     fprintf('%g \n', func_evals)
 end
 
-triggerEvent(coderEnums.eventTypes.Plot, result, problemStruct);
+if doPlotEvent 
+    triggerEvent(coderEnums.eventTypes.Plot, result, problemStruct);
+end
 
 % OutputFcn and PlotFcns call
 % if haveoutputfcn || haveplotfcn
@@ -191,10 +186,13 @@
         y(j) = zero_term_delta;
     end
     v(:,j+1) = y;
-    x(:) = y; [f, result] = funfcn(x,varargin{:});
+    if doPlotEvent && j==n 
+        controls.calcSLD = true;
+    end
+    x(:) = y; [f, result] = funfcn(x, problemStruct, controls, params);
     fv(1,j+1) = f;
 end
-
+controls.calcSLD = false;
 % sort so v(1,:) has the lowest function value
 [fv,j] = sort(fv);
 v = v(:,j);
@@ -215,7 +213,7 @@
 %     fprintf('%s \n', 'func_evals = ')
 %     fprintf('%g \n', func_evals)
 end
-if rem(itercount, controls.updatePlotFreq) == 0
+if doPlotEvent && rem(itercount, controls.updatePlotFreq) == 0
     triggerEvent(coderEnums.eventTypes.Plot, result, problemStruct);
 end
 if isRATStopped(controls.IPCFilePath)
@@ -247,6 +245,9 @@
 % The iteration stops if the maximum number of iterations or function evaluations 
 % are exceeded
 while func_evals < maxfun && itercount < maxiter
+    if doPlotEvent
+        controls.calcSLD = true;
+    end
     if max(abs(fv(1)-fv(2:n+1))) <= max(tolf,10*eps(fv(1))) && ...
             max(max(abs(v(:,2:n+1)-v(:,onesn)))) <= max(tolx,10*eps(max(v(:,1))))
         break
@@ -257,13 +258,14 @@
     % xbar = average of the n (NOT n+1) best points
     xbar = sum(v(:,1:n), 2)/n;
     xr = (1 + rho)*xbar - rho*v(:,end);
-    x(:) = xr; [fxr, result] = funfcn(x,varargin{:});
+    x(:) = xr; [fxr, result] = funfcn(x, problemStruct, controls, params);
     func_evals = func_evals+1;
     
     if fxr < fv(:,1)
         % Calculate the expansion point
         xe = (1 + rho*chi)*xbar - rho*chi*v(:,end);
-        x(:) = xe; [fxe, result] = funfcn(x,varargin{:});
+
+        x(:) = xe; [fxe, result] = funfcn(x, problemStruct, controls, params);
         func_evals = func_evals+1;
         if fxe < fxr
             v(:,end) = xe;
@@ -284,7 +286,7 @@
             if fxr < fv(:,end)
                 % Perform an outside contraction
                 xc = (1 + psi*rho)*xbar - psi*rho*v(:,end);
-                x(:) = xc; [fxc, result] = funfcn(x,varargin{:});
+                x(:) = xc; [fxc, result] = funfcn(x, problemStruct, controls, params);
                 func_evals = func_evals+1;
                 
                 if fxc <= fxr
@@ -298,7 +300,7 @@
             else
                 % Perform an inside contraction
                 xcc = (1-psi)*xbar + psi*v(:,end);
-                x(:) = xcc; [fxcc, result] = funfcn(x,varargin{:});
+                x(:) = xcc; [fxcc, result] = funfcn(x, problemStruct, controls, params);
                 func_evals = func_evals+1;
                 
                 if fxcc < fv(:,end)
@@ -313,7 +315,7 @@
             if strcmp(how,'shrink')
                 for j=2:n+1
                     v(:,j)=v(:,1)+sigma*(v(:,j) - v(:,1));
-                    x(:) = v(:,j); [fv(:,j), result] = funfcn(x,varargin{:});
+                    x(:) = v(:,j); [fv(:,j), result] = funfcn(x, problemStruct, controls, params);
                 end
                 func_evals = func_evals + n;
             end
@@ -334,7 +336,8 @@
 %         fprintf('%s \n', 'func_evals = ')
 %         fprintf('%s \n', num2str(func_evals))
     end
-    if rem(itercount, controls.updatePlotFreq) == 0   
+    controls.calcSLD = false;
+    if doPlotEvent && rem(itercount, controls.updatePlotFreq) == 0   
         triggerEvent(coderEnums.eventTypes.Plot, result, problemStruct);
     end
     if isRATStopped(controls.IPCFilePath)
@@ -362,7 +365,7 @@
     % This should ensure the final result is printed at the end of a run irrespective of update frequency
     triggerEvent(coderEnums.eventTypes.Message, sprintf(' %5.0f        %5.0f     %12.6g         %s\n', itercount, func_evals, fv(1), how));
 end
-if rem(itercount, controls.updatePlotFreq) ~= 0
+if doPlotEvent && rem(itercount, controls.updatePlotFreq) ~= 0
     % This should ensure the final result is always plotted irrespective of update frequency
    triggerEvent(coderEnums.eventTypes.Plot, result, problemStruct);
 end