diff --git a/FemDesign.Core/Loads/Loads/Loads.cs b/FemDesign.Core/Loads/Loads/Loads.cs
index df5e816c..ee0066c5 100644
--- a/FemDesign.Core/Loads/Loads/Loads.cs
+++ b/FemDesign.Core/Loads/Loads/Loads.cs
@@ -104,6 +104,10 @@ public partial class Loads
             objs.AddRange(this.SurfaceTemperatureLoads);
             objs.AddRange(this.FootfallAnalysisData);
             objs.AddRange(this.Masses);
+            objs.Add(this.ExcitationForce);
+            objs.Add(this.PeriodicExcitations);
+            //objs.Add(this.GroundAccelerations);
+            //objs.Add(this.SeismicLoads);
             return objs;
         }
 
diff --git a/FemDesign.Core/Model/Model.cs b/FemDesign.Core/Model/Model.cs
index ecb10017..ae34e597 100644
--- a/FemDesign.Core/Model/Model.cs
+++ b/FemDesign.Core/Model/Model.cs
@@ -704,6 +704,10 @@ private bool FictShellInModel(ModellingTools.FictitiousShell obj)
         /// </summary>
         private void AddComplexSection(Sections.ComplexSection complexSection, bool overwrite)
         {
+            if (this.Sections == null)
+            {
+                this.Sections = new Sections.ModelSections();
+            }
             // in model?
             bool inModel = this.ComplexSectionInModel(complexSection);
 
diff --git a/femdesign-api.sln b/femdesign-api.sln
index 7691b732..3b93a10b 100644
--- a/femdesign-api.sln
+++ b/femdesign-api.sln
@@ -69,6 +69,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Practical example - Optimis
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Example 8 - SlabReinforcement", "FemDesign.Examples\C#\Example 8 - SlabReinforcement\Example 8 - SlabReinforcement.csproj", "{BEC4FB61-E232-4680-8B90-F154BF3C5884}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ConsoleAppForDebug", "FemDesign.Examples\C#\ConsoleAppForDebug\ConsoleAppForDebug.csproj", "{57F387DD-BD22-481E-8489-9AEC7CD6F67D}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -154,6 +156,10 @@ Global
 		{BEC4FB61-E232-4680-8B90-F154BF3C5884}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{BEC4FB61-E232-4680-8B90-F154BF3C5884}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{BEC4FB61-E232-4680-8B90-F154BF3C5884}.Release|Any CPU.Build.0 = Release|Any CPU
+		{57F387DD-BD22-481E-8489-9AEC7CD6F67D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{57F387DD-BD22-481E-8489-9AEC7CD6F67D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{57F387DD-BD22-481E-8489-9AEC7CD6F67D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{57F387DD-BD22-481E-8489-9AEC7CD6F67D}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -181,6 +187,7 @@ Global
 		{0FB2E28B-8C5B-49C4-98B3-E34B6EE9F2FF} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
 		{5425BE85-A616-4DC7-8E80-CB124C8320EC} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
 		{BEC4FB61-E232-4680-8B90-F154BF3C5884} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
+		{57F387DD-BD22-481E-8489-9AEC7CD6F67D} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {DDF9D949-F79B-4EA6-A766-976B0BE0BC79}