Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.App/HeuristicLab.JsonInterface.App.csproj
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.App/HeuristicLab.JsonInterface.App.csproj	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.App/HeuristicLab.JsonInterface.App.csproj	(revision 18044)
@@ -40,8 +40,4 @@
     <Reference Include="Google.Protobuf, Version=3.6.1.0, Culture=neutral, PublicKeyToken=a7d26565bac4d604, processorArchitecture=MSIL">
       <HintPath>..\packages\Google.Protobuf.3.6.1\lib\net45\Google.Protobuf.dll</HintPath>
-    </Reference>
-    <Reference Include="HEAL.Attic, Version=1.4.0.0, Culture=neutral, PublicKeyToken=ba48961d6f65dcec, processorArchitecture=MSIL">
-      <HintPath>..\packages\HEAL.Attic.1.4.0\lib\net461\HEAL.Attic.dll</HintPath>
-      <Private>False</Private>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=12.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
@@ -95,5 +91,4 @@
       <Project>{A9AD58B9-3EF9-4CC1-97E5-8D909039FF5C}</Project>
       <Name>HeuristicLab.Common-3.3</Name>
-      <Private>False</Private>
     </ProjectReference>
     <ProjectReference Include="..\HeuristicLab.Core\3.3\HeuristicLab.Core-3.3.csproj">
@@ -122,9 +117,4 @@
       <Private>False</Private>
     </ProjectReference>
-    <ProjectReference Include="..\HeuristicLab.Problems.Instances\3.3\HeuristicLab.Problems.Instances-3.3.csproj">
-      <Project>{3540E29E-4793-49E7-8EE2-FEA7F61C3994}</Project>
-      <Name>HeuristicLab.Problems.Instances-3.3</Name>
-      <Private>False</Private>
-    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.App/Plugin.cs.frame
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.App/Plugin.cs.frame	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.App/Plugin.cs.frame	(revision 18044)
@@ -27,13 +27,12 @@
   [Plugin("HeuristicLab.JsonInterface.App", "3.3.16.0")]
   [PluginFile("HeuristicLab.JsonInterface.App.dll", PluginFileType.Assembly)]
-  [PluginDependency("HeuristicLab.Attic", "1.0")]
   [PluginDependency("HeuristicLab.JsonInterface", "3.3")]
   [PluginDependency("HeuristicLab.Optimization", "3.3")]
   [PluginDependency("HeuristicLab.Collections", "3.3")]
-  [PluginDependency("HeuristicLab.Common", "3.3")]
+  //[PluginDependency("HeuristicLab.Common", "3.3")]
   [PluginDependency("HeuristicLab.Common.Resources", "3.3")]
   [PluginDependency("HeuristicLab.Core", "3.3")]
   [PluginDependency("HeuristicLab.ParallelEngine", "3.3")]
-  [PluginDependency("HeuristicLab.Problems.Instances", "3.3")]
+  //[PluginDependency("HeuristicLab.Problems.Instances", "3.3")]
   public class HeuristicLabJsonInterfaceAppPlugin : PluginBase {
   }
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/FileManager.cs
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/FileManager.cs	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/FileManager.cs	(revision 18044)
@@ -21,6 +21,10 @@
       if (!view.Locked && content != null) {
         if(content is IOptimizer) {
-          exportDialog.Content = content;
-          exportDialog.ShowDialog();
+          try {
+            exportDialog.Content = content;
+            exportDialog.ShowDialog();
+          } catch (Exception e) {
+            ErrorHandling.ShowErrorDialog(e);
+          }
         } else {
           MessageBox.Show("This cannot item cannot be converted.", "Unsupported Item", MessageBoxButtons.OK);
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/MenuItems/ExportJsonTemplateMenuItem.cs
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/MenuItems/ExportJsonTemplateMenuItem.cs	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/MenuItems/ExportJsonTemplateMenuItem.cs	(revision 18044)
@@ -1,7 +1,4 @@
 ﻿using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 using HeuristicLab.Common;
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/Plugin.cs.frame
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/Plugin.cs.frame	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface.OptimizerIntegration/Plugin.cs.frame	(revision 18044)
@@ -26,7 +26,8 @@
   [Plugin("HeuristicLab.JsonInterface.OptimizerIntegration", "3.3.16.0")]
   [PluginFile("HeuristicLab.JsonInterface.OptimizerIntegration.dll", PluginFileType.Assembly)]
-  [PluginDependency("HeuristicLab.Attic", "1.0")]
+  //[PluginDependency("HeuristicLab.Attic", "1.0")]
   [PluginDependency("HeuristicLab.JsonInterface", "3.3")]
   [PluginDependency("HeuristicLab.Common", "3.3")]
+  [PluginDependency("HeuristicLab.Common.Resources", "3.3")]
   [PluginDependency("HeuristicLab.Core", "3.3")]
   [PluginDependency("HeuristicLab.Optimization", "3.3")]
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/Converters/RegressionProblemDataConverter.cs
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/Converters/RegressionProblemDataConverter.cs	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/Converters/RegressionProblemDataConverter.cs	(revision 18044)
@@ -244,6 +244,10 @@
 
         int r = 0;
-        foreach (var callValue in x.Value) {
-          matrix[c][r] = (T)callValue;
+        foreach (var cellValue in x.Value) {
+          try {
+            matrix[c][r] = (T)cellValue;
+          } catch (Exception e) {
+            throw new AggregateException($"The cell value '{cellValue}' in row {r} cannot be converted to {typeof(T).FullName}.", e);
+          }
           ++r;
         }
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/HeuristicLab.JsonInterface.csproj
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/HeuristicLab.JsonInterface.csproj	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/HeuristicLab.JsonInterface.csproj	(revision 18044)
@@ -139,5 +139,5 @@
     </ProjectReference>
     <ProjectReference Include="..\HeuristicLab.Common\3.3\HeuristicLab.Common-3.3.csproj">
-      <Project>{a9ad58b9-3ef9-4cc1-97e5-8d909039ff5c}</Project>
+      <Project>{A9AD58B9-3EF9-4CC1-97E5-8D909039FF5C}</Project>
       <Name>HeuristicLab.Common-3.3</Name>
     </ProjectReference>
@@ -178,8 +178,4 @@
       <Name>HeuristicLab.Problems.DataAnalysis-3.4</Name>
     </ProjectReference>
-    <ProjectReference Include="..\HeuristicLab.Problems.Instances.DataAnalysis\3.3\HeuristicLab.Problems.Instances.DataAnalysis-3.3.csproj">
-      <Project>{94c7714e-29d4-4d6d-b213-2c18d627ab75}</Project>
-      <Name>HeuristicLab.Problems.Instances.DataAnalysis-3.3</Name>
-    </ProjectReference>
   </ItemGroup>
   <ItemGroup />
Index: branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/Plugin.cs.frame
===================================================================
--- branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/Plugin.cs.frame	(revision 18043)
+++ branches/3026_IntegrationIntoSymSpace/HeuristicLab.JsonInterface/Plugin.cs.frame	(revision 18044)
@@ -28,5 +28,5 @@
   [PluginDependency("HeuristicLab.Attic", "1.0")]
   [PluginDependency("HeuristicLab.Collections", "3.3")]
-  [PluginDependency("HeuristicLab.Common", "3.3")]
+  //[PluginDependency("HeuristicLab.Common", "3.3")]
   [PluginDependency("HeuristicLab.Core", "3.3")]
   [PluginDependency("HeuristicLab.Data", "3.3")]
@@ -37,5 +37,5 @@
   [PluginDependency("HeuristicLab.Problems.DataAnalysis.Symbolic", "3.4")]
   [PluginDependency("HeuristicLab.Problems.DataAnalysis.Symbolic.Regression", "3.4")]
-  [PluginDependency("HeuristicLab.Problems.Instances.DataAnalysis", "3.3")]
+  //[PluginDependency("HeuristicLab.Problems.Instances.DataAnalysis", "3.3")]
   public class HeuristicLabJsonInterfacePlugin : PluginBase {
   }
