diff --git a/Wizard/DxpIsolatedEnv.cs b/Wizard/DxpIsolatedEnv.cs
new file mode 100644
index 0000000..c593637
--- /dev/null
+++ b/Wizard/DxpIsolatedEnv.cs
@@ -0,0 +1,62 @@
+/*
+ * The MIT License (MIT)
+ * 
+ * Copyright (c) 2016-2017  Denis Kuzmin < entry.reg@gmail.com > :: github.com/3F
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+*/
+
+using System;
+using System.Collections.Generic;
+using net.r_eg.MvsSln.Core;
+using net.r_eg.MvsSln.Log;
+
+namespace net.r_eg.DllExport.Wizard
+{
+    /// <summary>
+    /// https://github.com/3F/DllExport/issues/56
+    /// TODO: MvsSln core
+    /// </summary>
+    public class DxpIsolatedEnv: IsolatedEnv, IEnvironment
+    {
+        public const string ERR_MSG = "DXPInternalErrorMsg";
+
+        public DxpIsolatedEnv(ISlnResult data)
+            : base(data)
+        {
+
+        }
+
+        protected override Microsoft.Build.Evaluation.Project Load(string path, IDictionary<string, string> properties)
+        {
+            try
+            {
+                return base.Load(path, properties);
+            }
+            catch(Exception ex)
+            {
+                LSender._.send(this, $"MBE. Found problem when new Project('{path}'): '{ex.Message}'", Message.Level.Debug);
+
+                var prj = new Microsoft.Build.Evaluation.Project();
+                prj.SetProperty(ERR_MSG, ex.Message);
+                return prj;
+            }
+        }
+    }
+}
diff --git a/Wizard/Executor.cs b/Wizard/Executor.cs
index 6fa1712..8fc1cd6 100644
--- a/Wizard/Executor.cs
+++ b/Wizard/Executor.cs
@@ -37,7 +37,7 @@ namespace net.r_eg.DllExport.Wizard
 {
     public class Executor: IExecutor, IConfigInitializer, IDisposable
     {
-        protected Dictionary<string, Sln> solutions = new Dictionary<string, Sln>();
+        protected Dictionary<string, IEnvironment> solutions = new Dictionary<string, IEnvironment>();
 
         /// <summary>
         /// Cache for loaded projects.
@@ -163,7 +163,7 @@ public bool UpdateCfgStorageType(string sln)
                 return false;
             }
 
-            if(UniqueProjectsBy(sln).Any(p => p.HasExternalStorage)) {
+            if(UniqueProjectsBy(sln)?.Any(p => p.HasExternalStorage) == true) {
                 Config.CfgStorage = CfgStorageType.TargetsFile;
                 return true;
             }
@@ -206,15 +206,22 @@ protected IEnvironment GetEnv(string file)
                 return null;
             }
 
-            if(!solutions.ContainsKey(file)) {
-                solutions[file] = new Sln(file, SlnItems.EnvWithMinimalProjects);
+            if(!solutions.ContainsKey(file))
+            {
+                var sln = new Sln(file, SlnItems.Projects 
+                                            | SlnItems.SolutionConfPlatforms 
+                                            | SlnItems.ProjectConfPlatforms);
+
+                solutions[file] = new DxpIsolatedEnv(sln.Result);
+                solutions[file].LoadMinimalProjects();
             }
-            return solutions[file].Result.Env;
+
+            return solutions[file];
         }
 
         private void Free()
         {
-            solutions?.ForEach(sln => sln.Value.Result?.Env?.Dispose());
+            solutions?.ForEach(sln => sln.Value?.Dispose());
 
             if(_targetsFile != null) {
                 _targetsFile.Dispose();
diff --git a/Wizard/IProject.cs b/Wizard/IProject.cs
index 2c58c96..ce1c0b3 100644
--- a/Wizard/IProject.cs
+++ b/Wizard/IProject.cs
@@ -39,6 +39,12 @@ public interface IProject
         /// </summary>
         bool Installed { get; }
 
+        /// <summary>
+        /// Message if an internal error occurred, otherwise null value.
+        /// TODO: because of DxpIsolatedEnv. See details there.
+        /// </summary>
+        string InternalError { get; }
+
         /// <summary>
         /// Special identifier. Like `ProjectGuid` that is not available in SDK-based projects.
         /// https://github.com/3F/DllExport/issues/36#issuecomment-320794498
diff --git a/Wizard/Project.cs b/Wizard/Project.cs
index 13c5b47..038da09 100644
--- a/Wizard/Project.cs
+++ b/Wizard/Project.cs
@@ -65,7 +65,16 @@ public IXProject XProject
         /// </summary>
         public bool Installed
         {
-            get => !String.IsNullOrWhiteSpace(GetProperty(MSBuildProperties.DXP_ID));
+            get => InternalError == null && !String.IsNullOrWhiteSpace(GetProperty(MSBuildProperties.DXP_ID));
+        }
+
+        /// <summary>
+        /// Message if an internal error occurred, otherwise null value.
+        /// TODO: because of DxpIsolatedEnv. See details there.
+        /// </summary>
+        public string InternalError
+        {
+            get => XProject?.GetProperty(DxpIsolatedEnv.ERR_MSG, true).evaluatedValue;
         }
 
         /// <summary>
@@ -306,7 +315,9 @@ protected IUserConfig GetUserConfig(IXProject project, IConfigInitializer cfg)
         /// </summary>
         protected void Save()
         {
-            XProject?.Save();
+            if(XProject?.ProjectFullPath != null && InternalError == null) {
+                XProject.Save();
+            }
         }
 
         protected void CfgDDNS()
diff --git a/Wizard/UI/ConfiguratorForm.cs b/Wizard/UI/ConfiguratorForm.cs
index d0d2628..7bd0242 100644
--- a/Wizard/UI/ConfiguratorForm.cs
+++ b/Wizard/UI/ConfiguratorForm.cs
@@ -158,13 +158,8 @@ private void RenderProjects(string sln)
 
             toolTipMain.SetToolTip(comboBoxSln, sln);
 
-            var projects = exec.UniqueProjectsBy(sln);
-            if(projects != null)
-            {
-                foreach(var project in projects) {
-                    projectItems.Add(project);
-                }
-            }
+            exec.UniqueProjectsBy(sln)?
+                .ForEach(prj => projectItems.Add(prj));
         }
 
         private void DoSilentAction(Action act, ComboBox box, EventHandler handler)
diff --git a/Wizard/UI/Controls/ProjectItemControl.cs b/Wizard/UI/Controls/ProjectItemControl.cs
index 633aa07..8423882 100644
--- a/Wizard/UI/Controls/ProjectItemControl.cs
+++ b/Wizard/UI/Controls/ProjectItemControl.cs
@@ -24,6 +24,7 @@
 
 using System;
 using System.ComponentModel;
+using System.IO;
 using System.Windows.Forms;
 using RGiesecke.DllExport;
 
@@ -32,7 +33,12 @@ namespace net.r_eg.DllExport.Wizard.UI.Controls
     internal sealed partial class ProjectItemControl: UserControl
     {
         private readonly int EX_HEIGHT;
-        private IProject project;
+
+        public IProject Project
+        {
+            get;
+            private set;
+        }
 
         public bool Installed
         {
@@ -159,9 +165,21 @@ public void SetNamespace(string name, bool addIfNotExists = true)
             Namespaces.Text = name;
         }
 
+        public bool LockIfError(string msg)
+        {
+            if(msg == null) {
+                return false;
+            }
+
+            chkInstalled.Enabled    = false;
+            textBoxIdent.Text       = "Project cannot be loaded:";
+            textBoxProjectPath.Text = msg;
+            return true;
+        }
+
         public ProjectItemControl(IProject project)
         {
-            this.project = project;
+            Project = project ?? throw  new ArgumentNullException(nameof(project));
 
             InitializeComponent();
             EX_HEIGHT = Height;
@@ -244,9 +262,9 @@ private void InstalledStatus(bool status)
 
         private void btnBrowse_Click(object sender, EventArgs e)
         {
-            var path = project?.XProject?.ProjectPath;
+            var path = Project.XProject?.ProjectItem.project.fullPath;
             if(!String.IsNullOrWhiteSpace(path)) {
-                Browse?.Invoke(path);
+                Browse?.Invoke(Path.GetDirectoryName(path));
             }
         }
 
diff --git a/Wizard/UI/Controls/ProjectItemsControl.cs b/Wizard/UI/Controls/ProjectItemsControl.cs
index b9c7202..a3191e4 100644
--- a/Wizard/UI/Controls/ProjectItemsControl.cs
+++ b/Wizard/UI/Controls/ProjectItemsControl.cs
@@ -153,17 +153,21 @@ private void ConfigureControl(ProjectItemControl control, IProject project)
             control.Platform        = project.Config.Platform;
             control.Compiler        = project.Config.Compiler;
 
-            control.Browse              = Browse;
-            control.NamespaceValidate   = NamespaceValidate;
-            control.OpenUrl             = OpenUrl;
+            control.Browse  = Browse;
+            control.OpenUrl = OpenUrl;
+
+            if(control.LockIfError(project.InternalError)) {
+                return;
+            }
+
+            control.NamespaceValidate = NamespaceValidate;
 
             control.Namespaces.Items.Clear();
             control.Namespaces.Items.AddRange(project.Config.Namespaces.ToArray());
             control.Namespaces.SelectedIndex = 0;
-
             control.Namespaces.MaxLength = project.Config.NSBuffer;
 
-            if(project.Installed) {
+            if(control.Installed) {
                 control.SetNamespace(project.Config.Namespace, true);
             }
         }
diff --git a/Wizard/Wizard.csproj b/Wizard/Wizard.csproj
index e7bce48..92aa41e 100644
--- a/Wizard/Wizard.csproj
+++ b/Wizard/Wizard.csproj
@@ -67,6 +67,7 @@
     <Compile Include="IExecutor.cs" />
     <Compile Include="CompilerCfg.cs" />
     <Compile Include="MSBuildProperties.cs" />
+    <Compile Include="DxpIsolatedEnv.cs" />
     <Compile Include="Platform.cs" />
     <Compile Include="IProject.cs" />
     <Compile Include="ITargetsFile.cs" />