diff --git a/3rd_party/CalcMD5/CalcMD5.m b/3rd_party/CalcMD5/CalcMD5.m
index 687f113..5cea15f 100644
--- a/3rd_party/CalcMD5/CalcMD5.m
+++ b/3rd_party/CalcMD5/CalcMD5.m
@@ -67,5 +67,21 @@
 
 % If the current Matlab path is the parent folder of this script, the
 % MEX function is not found - change the current directory!
-error(['JSim:', mfilename, ':NoMex'], 'Cannot find MEX script.');
+if ~exist(['CalcMD5' mexext], 'file')
+    warning('CalcMD5 does not seem compiled. Compiling...');
+    old_cd = pwd;
+    cd(fileparts(mfilename('fullpath')));
+    if strcmpi(mex.getCompilerConfigurations('C').Name(1:3), 'gcc')
+        mex CFLAGS="\$CFLAGS -std=c99" CalcMD5.c
+    else
+        mex CalcMD5.c
+    end
+    cd(old_cd);
 
+    if (nargin < 2), MD5 = CalcMD5(Data);
+    elseif (nargin < 3), MD5 = CalcMD5(Data, InClass);
+    else MD5 = CalcMD5(Data, InClass);
+    end
+else
+    error(['JSim:', mfilename, ':NoMex'], 'Cannot find MEX script.');
+end
\ No newline at end of file
diff --git a/3rd_party/CalcMD5/CalcMD5.mexa64 b/3rd_party/CalcMD5/CalcMD5.mexa64
new file mode 100644
index 0000000..002fad8
Binary files /dev/null and b/3rd_party/CalcMD5/CalcMD5.mexa64 differ
diff --git a/README.md b/README.md
index f9b06c6..fb3b723 100644
--- a/README.md
+++ b/README.md
@@ -7,16 +7,13 @@ throughout my other projects. Make sure you download and keep updated!
 Installation
 ------------
 
+Update: the CalcMD5 code should now auto-compile upon its first exectuion.
+
 Compile the weighted histogram code:
 
     cd mycode/histogram
     mex whistc.c
 
-Compile the MD5 code:
-
-    cd 3rd_party/CalcMD5
-    mex CalcMD5.c
-
 Compile the KDE code:
 
     cd 3rd_party/@kde/mex
@@ -24,4 +21,4 @@ Compile the KDE code:
 
 Get export_fig from:
 
-    https://github.com/altmany/export_fig
\ No newline at end of file
+    https://github.com/altmany/export_fig
diff --git a/mycode/parallel/runFunctionOnDatabase.m b/mycode/parallel/runFunctionOnDatabase.m
index 527c297..5a23469 100644
--- a/mycode/parallel/runFunctionOnDatabase.m
+++ b/mycode/parallel/runFunctionOnDatabase.m
@@ -75,6 +75,9 @@
 pBar.pop_bar();
 
 if parallel
+    if exist(getPathName(local, 'slaves'), 'dir') == 0
+        mkdir(getPathName(local, 'slaves'));
+    end
     % start the processing!
     settings = struct('multicoreDir', getPathName(local, 'slaves'), ...
         'nrOfEvalsAtOnce', nrOfEvalsAtOnce, 'useWaitbar', useWaitbar, ...