diff --git a/src/components/DistBuilder.re b/src/components/DistBuilder.re
index 5f3fd6da..adff8715 100644
--- a/src/components/DistBuilder.re
+++ b/src/components/DistBuilder.re
@@ -165,8 +165,8 @@ module DemoDist = {
              <DistPlusPlot distPlus={DistPlus.T.normalize(distPlus1)} />
            | Ok(`Function(f, a)) =>
              let result1 = DistPlusRenderer.runFunction(inputs1, (f, a), [|`SymbolicDist(`Float(5.0))|],);
-             let result2 = DistPlusRenderer.runFunction(inputs1, (f, a), [|`SymbolicDist(`Float(20.0))|],);
-             let result3 = DistPlusRenderer.runFunction(inputs1, (f, a), [|`SymbolicDist(`Float(40.0))|],);
+             let result2 = DistPlusRenderer.runFunction(inputs1, (f, a), [|`SymbolicDist(`Float(10.0))|],);
+             let result3 = DistPlusRenderer.runFunction(inputs1, (f, a), [|`SymbolicDist(`Float(20.0))|],);
              switch (result1, result2, result3) {
              | (Ok(`DistPlus(distPlus1)),Ok(`DistPlus(distPlus2)),Ok(`DistPlus(distPlus3)))  =>
              <>
@@ -174,6 +174,7 @@ module DemoDist = {
                <DistPlusPlot distPlus={DistPlus.T.normalize(distPlus2)} />
                <DistPlusPlot distPlus={DistPlus.T.normalize(distPlus3)} />
              </>
+             | (Error(r), _, _) => r |> R.ste
              | _ => "Failure " |> R.ste
              };
            | Error(r) => r |> R.ste
diff --git a/src/components/charts/DistPlusPlot.re b/src/components/charts/DistPlusPlot.re
index ca8c0dc1..e13fcac0 100644
--- a/src/components/charts/DistPlusPlot.re
+++ b/src/components/charts/DistPlusPlot.re
@@ -259,7 +259,6 @@ module DistPlusChart = {
 module IntegralChart = {
   [@react.component]
   let make = (~distPlus: DistTypes.distPlus, ~config: chartConfig, ~onHover) => {
-    open DistPlus;
     let integral = distPlus.integralCache;
     let continuous =
       integral
diff --git a/src/distPlus/expressionTree/ExpressionTree.re b/src/distPlus/expressionTree/ExpressionTree.re
index b61d04ce..3e7193ab 100644
--- a/src/distPlus/expressionTree/ExpressionTree.re
+++ b/src/distPlus/expressionTree/ExpressionTree.re
@@ -9,7 +9,7 @@ let toLeaf = (samplingInputs, environment, node: node) =>
 let rec toString: node => string =
   fun
   | `SymbolicDist(d) => SymbolicDist.T.toString(d)
-  | `RenderedDist(_) => "[shape]"
+  | `RenderedDist(_) => "[renderedShape]"
   | `AlgebraicCombination(op, t1, t2) =>
     Operation.Algebraic.format(op, toString(t1), toString(t2))
   | `PointwiseCombination(op, t1, t2) =>
diff --git a/src/distPlus/expressionTree/Functions.re b/src/distPlus/expressionTree/Functions.re
index 64dca1fe..1f7a6dd2 100644
--- a/src/distPlus/expressionTree/Functions.re
+++ b/src/distPlus/expressionTree/Functions.re
@@ -93,5 +93,5 @@ let fnn =
     | _ => Error("Needs 3 valid arguments")
     }
   | ("to", _) => to_(args)
-  | _ => Error("Function not found")
+  | _ => Error("Function " ++ name ++ " not found")
   };
diff --git a/src/distPlus/renderers/DistPlusRenderer.re b/src/distPlus/renderers/DistPlusRenderer.re
index 4765722d..e8c97342 100644
--- a/src/distPlus/renderers/DistPlusRenderer.re
+++ b/src/distPlus/renderers/DistPlusRenderer.re
@@ -144,24 +144,31 @@ let run = (inputs: Inputs.inputs) => {
   |> E.R.bind(_, r =>
        switch (r) {
        | `RenderedDist(n) => Ok(n)
-       | _ => Error("Didn't output renderedDist")
+       | n =>
+         Error(
+           "Didn't output a rendered distribution. Format:"
+           ++ ExpressionTree.toString(n),
+         )
        }
      )
   |> E.R.fmap(Internals.outputToDistPlus(inputs));
 };
 
+let exportDistPlus = inputs =>
+  fun
+  | `RenderedDist(n) => Ok(`DistPlus(Internals.outputToDistPlus(inputs, n)))
+  | `Function(n) => Ok(`Function(n))
+  | n =>
+    Error(
+      "Didn't output a rendered distribution. Format:"
+      ++ ExpressionTree.toString(n),
+    );
+
 let run2 = (inputs: Inputs.inputs) => {
   inputs
   |> Internals.distPlusRenderInputsToInputs
   |> Internals.inputsToLeaf
-  |> E.R.bind(_, r =>
-       switch (r) {
-       | `RenderedDist(n) =>
-         Ok(`DistPlus(Internals.outputToDistPlus(inputs, n)))
-       | `Function(n) => Ok(`Function(n))
-       | _ => Error("Didn't output renderedDist")
-       }
-     );
+  |> E.R.bind(_, exportDistPlus(inputs));
 };
 
 let runFunction =
@@ -185,10 +192,5 @@ let runFunction =
       fnInputs,
       fn,
     );
-    Js.log2("GOt output", output);
-  switch (output) {
-  | Ok(`RenderedDist(n)) => Ok(`DistPlus(Internals.outputToDistPlus(ins, n)))
-  | Ok(`Function(n)) => Ok(`Function(n))
-  | _ => Error("Didn't output renderedDist")
-  };
+  output |> E.R.bind(_, exportDistPlus(ins));
 };