diff --git a/Doxyfile b/Doxyfile
index 1d300c5fc..d7693eec1 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1,6 +1,7 @@
 #PROJECT_NAME          = "Hydra_examples_and_documentation"
 PROJECT_NUMBER         =  3.0.0
 
+
 STRIP_FROM_PATH        = /home/augalves/Development/Release/Hydra
  
 INPUT                  = /home/augalves/Development/Release/Hydra/hydra /home/augalves/Development/Release/Hydra/doxydefs /home/augalves/Development/Release/Hydra/examples /home/augalves/Development/Release/Hydra/README.md
diff --git a/THANKS.md b/THANKS.md
index 9cb0bc13a..3229ed970 100644
--- a/THANKS.md
+++ b/THANKS.md
@@ -1,19 +1,20 @@
-## Hydra 2.1.0
-
-* Chistoph Hasse and Henry Fredrick Schreiner for the very first feedback.
-* Serena Macolini for testing the links of the reference documentation.
-* Andrea Contu for patiently and kindly to test and debug the issues of Hydra on Pascal cuda archs and correct my very poor english in the readme.
-* Henry Fredrick Schreiner for the tips for Apple users (https://github.com/MultithreadCorner/Hydra/wiki/Tips-for-MacOS-users)
-
-## Hydra 2.2.1
-
-* Davide Brundu for a number of contributions, from new functors to bug reports and corrections.
-* Andrea Contu for moral support, extensive testing and bug report whn using hydra in his own projetcs. 
-* Marcos Romero for a number of contributions, from new functors to bug reports and corrections.,
-* Scott Stevenson for nicely reviewing the spelling of Readme.md. 
-
-## Hydra 3.0.0
-
-* Davide Brundu for a number of contributions, from new functionality to bug reports and corrections.
-* Andrea Contu always for the moral support, extensive testing and bug report whn using hydra in his own projetcs. 
-* Angelo di Canto, for the support, testing and skype based bug report.
+## Hydra 2.1.0
+
+* Chistoph Hasse and Henry Fredrick Schreiner for the very first feedback.
+* Serena Macolini for testing the links of the reference documentation.
+* Andrea Contu for patiently and kindly to test and debug the issues of Hydra on Pascal cuda archs and correct my very poor english in the readme.
+* Henry Fredrick Schreiner for the tips for Apple users (https://github.com/MultithreadCorner/Hydra/wiki/Tips-for-MacOS-users)
+
+## Hydra 2.2.1
+
+* Davide Brundu for a number of contributions, from new functors to bug reports and corrections.
+* Andrea Contu for moral support, extensive testing and bug report whn using hydra in his own projetcs. 
+* Marcos Romero for a number of contributions, from new functors to bug reports and corrections.,
+* Scott Stevenson for nicely reviewing the spelling of Readme.md. 
+
+## Hydra 3.0.0
+
+* Davide Brundu for a number of contributions, from new functionality to bug reports and corrections.
+* Andrea Contu always for the moral support, extensive testing and bug report whn using hydra in his own projetcs. 
+* Angelo di Canto, for the support, testing and skype based bug report.
+
diff --git a/hydra/Hydra.h b/hydra/Hydra.h
index 8f6cb780d..c7ca371a3 100644
--- a/hydra/Hydra.h
+++ b/hydra/Hydra.h
@@ -50,6 +50,7 @@
  */
 #define HYDRA_VERSION 300000
 
+
 /*! \def HYDRA_MAJOR_VERSION
  *  \brief The preprocessor macro \p HYDRA_MAJOR_VERSION encodes the
  *         major version number of Hydra.
diff --git a/hydra/SPlot.h b/hydra/SPlot.h
index afc76ab26..0851f644e 100644
--- a/hydra/SPlot.h
+++ b/hydra/SPlot.h
@@ -107,6 +107,7 @@ class SPlot: public detail::AddPdfBase<PDF1,PDF2,PDFs...>
 	SPlot( PDFSumExtendable<PDF1, PDF2, PDFs...> const& pdf, Iterator first, Iterator last):
 		fPDFs( pdf.GetPDFs() ),
 		fFunctors( pdf.GetFunctors()),
+		fCovMatrix( Eigen::Matrix<double, npdfs, npdfs>{} ),
 	    fBegin( iterator( first, transformer(  pdf.GetFunctors(), Eigen::Matrix<double, npdfs, npdfs>{} ))),
 		fEnd (iterator( last , transformer(  pdf.GetFunctors(), Eigen::Matrix<double, npdfs, npdfs>{} )))
 
@@ -114,11 +115,11 @@ class SPlot: public detail::AddPdfBase<PDF1,PDF2,PDFs...>
 		for(size_t i=0;i<npdfs; i++)
 			fCoeficients[i] = pdf.GetCoeficient(i);
 
-		fCovMatrix << 0.0, 0.0, 0.0, 0.0;
+		//fCovMatrix << 0.0, 0.0, 0.0, 0.0;
 
 
-		Eigen::Matrix<double, npdfs, npdfs>  init;
-		init << 0.0, 0.0, 0.0, 0.0;
+		Eigen::Matrix<double, npdfs, npdfs>  init = Eigen::Matrix<double, npdfs, npdfs>::Zero();
+		//init << 0.0, 0.0, 0.0, 0.0;
 
 		fCovMatrix = hydra_thrust::transform_reduce(system_type(), first, last,
 				detail::CovMatrixUnary<
diff --git a/hydra/detail/functors/DecayMother.h b/hydra/detail/functors/DecayMother.h
index 942782679..66537c92e 100644
--- a/hydra/detail/functors/DecayMother.h
+++ b/hydra/detail/functors/DecayMother.h
@@ -163,7 +163,7 @@ struct DecayMother
 	GReal_t process(size_t evt, Vector4R (&daugters)[N])
 	{
 
-		GRND randEng;//(  );
+		GRND randEng(fSeed);
 		randEng.discard(evt+3*N);
 		hydra_thrust::uniform_real_distribution<GReal_t> uniDist(0.0, 1.0);
 
diff --git a/hydra/detail/functors/ProcessSPlot.h b/hydra/detail/functors/ProcessSPlot.h
index fef673cd4..ffee46b1b 100644
--- a/hydra/detail/functors/ProcessSPlot.h
+++ b/hydra/detail/functors/ProcessSPlot.h
@@ -203,7 +203,7 @@ struct SWeights
 		Eigen::Matrix<double, nfunctors,1> values_vector(Eigen::Map<Eigen::Matrix<double, nfunctors,1> >(values).eval());
 		Eigen::Matrix<double, nfunctors,1> sweights(fICovMatrix*values_vector.eval());
 		auto wfvalues = detail::multiply_array_tuple(fCoeficients, fvalues);
-		GReal_t denominator   = 1;
+		GReal_t denominator   = 0.0;
 		detail::add_tuple_values(denominator, wfvalues);
 		sweights /=denominator;