diff --git a/ExampleFiles/Parameters/0_Model/GsaList_Members.gh b/ExampleFiles/Parameters/0_Model/GsaList_Members.gh
index 65e4c7c61..ad37b5fcb 100644
Binary files a/ExampleFiles/Parameters/0_Model/GsaList_Members.gh and b/ExampleFiles/Parameters/0_Model/GsaList_Members.gh differ
diff --git a/ExampleFiles/Parameters/0_Model/GsaList_Properties.gh b/ExampleFiles/Parameters/0_Model/GsaList_Properties.gh
index 5ba062323..1a8d3bba4 100644
Binary files a/ExampleFiles/Parameters/0_Model/GsaList_Properties.gh and b/ExampleFiles/Parameters/0_Model/GsaList_Properties.gh differ
diff --git a/GsaGH/Helpers/Assembly/Model/Lists.cs b/GsaGH/Helpers/Assembly/Model/Lists.cs
index 81b2977b1..1de5c70a3 100644
--- a/GsaGH/Helpers/Assembly/Model/Lists.cs
+++ b/GsaGH/Helpers/Assembly/Model/Lists.cs
@@ -309,9 +309,6 @@ private void ConvertList(List<GsaList> lists, GH_Component owner) {
     }
 
     private void ConvertList(GsaList list, GH_Component owner) {
-      if (list == null) {
-        return;
-      }
       GsaList copyList;
       switch (list.EntityType) {
         case EntityType.Element:
diff --git a/GsaGH/Helpers/Assembly/Properties/Properties.cs b/GsaGH/Helpers/Assembly/Properties/Properties.cs
index fa2bd6aa5..604b8d1ed 100644
--- a/GsaGH/Helpers/Assembly/Properties/Properties.cs
+++ b/GsaGH/Helpers/Assembly/Properties/Properties.cs
@@ -42,16 +42,16 @@ private static GsaGuidDictionary<Prop3D> GetProp3dDictionary(GsaModel model) {
     }
 
     private string GetPropertyReferenceDefinition(Guid guid) {
-      if (_sections.GuidDictionary.TryGetValue(guid, out int steelId)) {
-        return "PB" + steelId;
+      if (_sections.GuidDictionary.TryGetValue(guid, out int sectionId)) {
+        return "PB" + sectionId;
       }
 
-      if (_prop2ds.GuidDictionary.TryGetValue(guid, out int concreteId)) {
-        return "PA" + concreteId;
+      if (_prop2ds.GuidDictionary.TryGetValue(guid, out int pro2dId)) {
+        return "PA" + pro2dId;
       }
 
-      if (_prop3ds.GuidDictionary.TryGetValue(guid, out int frpId)) {
-        return "PV" + frpId;
+      if (_prop3ds.GuidDictionary.TryGetValue(guid, out int prop3dId)) {
+        return "PV" + prop3dId;
       }
 
       return GetMaterialReferenceDefinition(guid);
diff --git a/GsaGH/Helpers/GH/Inputs.cs b/GsaGH/Helpers/GH/Inputs.cs
index 9ead9235f..16188cb4d 100644
--- a/GsaGH/Helpers/GH/Inputs.cs
+++ b/GsaGH/Helpers/GH/Inputs.cs
@@ -151,8 +151,8 @@ internal static List<object> GetGooObjectsForLists(
                   break;
 
                 case GsaProperty3dGoo prop3dGoo:
-                  list.Add(prop3dGoo);
-                  break;
+                  owner.AddRuntimeError($"Unable to reference 3D property in a Member list.");
+                  continue;
 
                 case GsaMember1dGoo member1dGoo:
                   list.Add(member1dGoo);
diff --git a/IntegrationTests/2_Parameters/0_Model/GsaList_Members_Test.cs b/IntegrationTests/2_Parameters/0_Model/GsaList_Members_Test.cs
index 28605e01f..07478836a 100644
--- a/IntegrationTests/2_Parameters/0_Model/GsaList_Members_Test.cs
+++ b/IntegrationTests/2_Parameters/0_Model/GsaList_Members_Test.cs
@@ -15,6 +15,11 @@ public void NoRuntimeErrorTest() {
       Helper.TestNoRuntimeMessagesInDocument(Document, GH_RuntimeMessageLevel.Error);
     }
 
+    [Fact]
+    public void NoRuntimeWarningsTest() {
+      Helper.TestNoRuntimeMessagesInDocument(Document, GH_RuntimeMessageLevel.Warning, "Warning");
+    }
+
     [Theory]
     [InlineData("Test1Id", 1)]
     [InlineData("Test1Name", "Columns")]
@@ -36,6 +41,10 @@ public void NoRuntimeErrorTest() {
     [InlineData("Test5Name", "Ground floor")]
     [InlineData("Test5Type", "Member")]
     [InlineData("Test5Count", 1)]
+    [InlineData("Test6Id", 99)]
+    [InlineData("Test6Name", "3d list")]
+    [InlineData("Test6Type", "Member")]
+    [InlineData("Test6Count", 1)]
     public void Test(string groupIdentifier, object expected) {
       IGH_Param param = Helper.FindParameter(Document, groupIdentifier);
       Helper.TestGhPrimitives(param, expected);
diff --git a/IntegrationTests/2_Parameters/0_Model/GsaList_Properties_Test.cs b/IntegrationTests/2_Parameters/0_Model/GsaList_Properties_Test.cs
index 9638c2a6b..44b94c079 100644
--- a/IntegrationTests/2_Parameters/0_Model/GsaList_Properties_Test.cs
+++ b/IntegrationTests/2_Parameters/0_Model/GsaList_Properties_Test.cs
@@ -12,7 +12,12 @@ public class GsaList_Properties_Test {
 
     [Fact]
     public void NoRuntimeErrorTest() {
-      Helper.TestNoRuntimeMessagesInDocument(Document, GH_RuntimeMessageLevel.Error);
+      Helper.TestNoRuntimeMessagesInDocument(Document, GH_RuntimeMessageLevel.Error, "Error");
+    }
+
+    [Fact]
+    public void NoRuntimeWarningsTest() {
+      Helper.TestNoRuntimeMessagesInDocument(Document, GH_RuntimeMessageLevel.Warning, "Warning");
     }
 
     [Theory]
@@ -47,6 +52,10 @@ public void NoRuntimeErrorTest() {
     [InlineData("Test10Name", "Slabs Material list")]
     [InlineData("Test10Type", "Element")]
     [InlineData("Test10Count", 6)]
+    [InlineData("Test11Id", 5)]
+    [InlineData("Test11Name", "E3d list")]
+    [InlineData("Test11Type", "Element")]
+    [InlineData("Test11Count", 1)]
     public void Test(string groupIdentifier, object expected) {
       IGH_Param param = Helper.FindParameter(Document, groupIdentifier);
       Helper.TestGhPrimitives(param, expected);