diff --git a/src/Copulas.jl b/src/Copulas.jl
index c19e3a8..bd69637 100644
--- a/src/Copulas.jl
+++ b/src/Copulas.jl
@@ -15,9 +15,7 @@ typealias IntArrays Array{Array{Int, 1}, 1}
 ####################
 
 abstract Copula
-abstract PccCop <: Copula
-abstract PairCop <: PccCop
-abstract VarPairCop <: PccCop
+abstract PairCop <: Copula
 
 # parametric pair copulas
 abstract AbstractParamPC <: PairCop
@@ -27,12 +25,20 @@ abstract ParamPC_Cpp <: AbstractParamPC # VineCopulaCPP
 
 # package code goes here
 export # copula types
-PairCop,
+AbstractCTree,
 AbstractParamPC,
+Copula,
+CTreeParRef,
+CTreePaths,
+MixPC,
+ModPC,
+PairCop,
 ParamPC,
 ParamPC_Cpp,
-ModPC,
-MixPC,
+PCC,
+PITMatrix,
+Raw_html,
+Vine,
 # parametric copula types
 IndepPC,
 AMHPC,
@@ -76,10 +82,6 @@ Tawn2PC_Cpp,
 TawnPC_Cpp,
 tPC_Cpp,
 # functions
-PITMatrix,
-Tree,
-Vine,
-Raw_html,
 allPathVals,
 allVals,
 condSetChk,
diff --git a/src/PCC/Vines/graphviz.jl b/src/PCC/Vines/graphviz.jl
index 3c8d3f5..f9bd5d1 100644
--- a/src/PCC/Vines/graphviz.jl
+++ b/src/PCC/Vines/graphviz.jl
@@ -111,9 +111,9 @@ function toGviz(tr::CTreeParRef,
     write(stream, "}")
 end
 
-function toGviz(tr::AbstractCTree, stream::IO; args...)
+function toGviz(tr::AbstractCTree, stream::IO, chrt::String; args...)
     trPar = convert(CTreeParRef, tr)
-    return toGviz(trPar, stream; args...)
+    return toGviz(trPar, stream, chrt; args...)
 end
 
 function getCmd(tr::CTreeParRef, chrt::String)
diff --git a/test/condTree_test.jl b/test/condTree_test.jl
index 316e3c0..4008a69 100644
--- a/test/condTree_test.jl
+++ b/test/condTree_test.jl
@@ -107,10 +107,6 @@ end
 ## attach! ##
 #############
 
-#############
-## attach! ##
-#############
-
 ## attach to end of path
 tr = Copulas.CTreePaths(1, [2 3], [4])
 Copulas.attach!(tr, 5, [2,3])
diff --git a/test/graphviz_test.jl b/test/graphviz_test.jl
index 1c510ac..b53aa26 100644
--- a/test/graphviz_test.jl
+++ b/test/graphviz_test.jl
@@ -4,21 +4,23 @@ using Copulas
 using Base.Test
 
 tr = Copulas.CTreeParRef([0, 1, 2, 2])
+Copulas.viz(tr)
 
 expGraphvizString = """
 digraph {
-1 -> 2;
-2 -> 3;
-2 -> 4;
+node [shape=circle];
+edge [arrowhead=none];
+1 -> 2 ;
+2 -> 3 ;
+2 -> 4 ;
 }"""
 
-@test expGraphvizString == Copulas.toGviz(tr)
+@test expGraphvizString == Copulas.toConsole(tr)
 
 tr = Copulas.CTreePaths(6, [4,2], [5,3,1], [5,7], [5,8], [5,9],
                         [5,10], [11], [12], [13], [14])
    
 Copulas.viz(tr)
-Copulas.viz(tr, cmd="neato")
 
 Copulas.render(tr)
 ## Copulas.render(tr, "png", "/home/chris/treePic")
diff --git a/test/pitmatrix_test.jl b/test/pitmatrix_test.jl
index e568b53..b9a5984 100644
--- a/test/pitmatrix_test.jl
+++ b/test/pitmatrix_test.jl
@@ -30,4 +30,14 @@ kk = PITMatrix([0.1 0.3;
                                   0.4 -0.2;
                                   0.6 0.4])
 
+@test_throws Exception PITMatrix([0.1 0.3;
+                                  0.4 -0.2;
+                                  0.6 0.4])
+
+kk = reshape([0.1 0.2;
+              0.4 0.3;
+              0.5 0.1], 3, 2, 1)
+       
+@test_throws Exception PITMatrix(kk)
+
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index d7ded0c..fa6c062 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,10 +2,10 @@ using Copulas
 using Base.Test
 
 tests = [
-         ## "utils_test.jl",
-         ## "paircop_test.jl",
-         ## "condTree_test.jl",
-         ## "graphviz_test.jl",
+         "utils_test.jl",
+         "paircop_test.jl",
+         "condTree_test.jl",
+         "graphviz_test.jl",
          "vine_test.jl",
          "rvine_matrix_test.jl",
          "pcc_test.jl",
diff --git a/test/rvine_matrix_test.jl b/test/rvine_matrix_test.jl
index 221d93d..d716564 100644
--- a/test/rvine_matrix_test.jl
+++ b/test/rvine_matrix_test.jl
@@ -33,6 +33,14 @@ kk = [2 0 0; 2 3 0; 3 2 2]
 kk = [1 0 0; 2 3 0; 3 2 2]
 @test Copulas.chkColumnSubsets(kk)
 
+########
+## dg ##
+########
+
+kk = [1 0 0; 2 3 0; 3 2 2]
+rvm = Copulas.RVMatrix(kk)
+@test Copulas.dg(rvm) == kk
+
 ###############
 ## allExcept ##
 ###############
diff --git a/test/various_test.jl b/test/various_test.jl
new file mode 100644
index 0000000..214b77b
--- /dev/null
+++ b/test/various_test.jl
@@ -0,0 +1,11 @@
+module TestVarious
+
+using Copulas
+using Base.Test
+
+## undefined testpcc
+##------------------
+
+@test_throws Exception Copulas.testpcc(187)
+
+end