Added try-catch to PhysicsBody.Enabled setter

Hopefully this should help us track down what's causing this exception

Barotrauma/BarotraumaShared/Source/Physics/PhysicsBody.cs

@@ -169,7 +169,22 @@ namespace Barotrauma
         public bool Enabled
         {
             get { return isEnabled; }
-            set { isEnabled = value; if (isEnabled) body.Enabled = isPhysEnabled; else body.Enabled = false; }
+            set
+            {
+                isEnabled = value;
+                try
+                {
+                    if (isEnabled) body.Enabled = isPhysEnabled; else body.Enabled = false;
+                }
+                catch (Exception e)
+                {
+                    DebugConsole.ThrowError("Exception in PhysicsBody.Enabled = "+value+" ("+isPhysEnabled+")",e);
+                    if (UserData!=null) DebugConsole.NewMessage("PhysicsBody UserData: "+UserData.GetType().ToString(), Color.Red);
+                    if (GameMain.World.ContactManager == null) DebugConsole.NewMessage("ContactManager is null!", Color.Red);
+                    else if (GameMain.World.ContactManager.BroadPhase == null) DebugConsole.NewMessage("Broadphase is null!", Color.Red);
+                    if (body.FixtureList == null) DebugConsole.NewMessage("FixtureList is null!", Color.Red);
+                }
+            }
         }
 
         public bool PhysEnabled

Libraries/Farseer Physics Engine 3.5/Farseer Physics MonoGame.csproj

@@ -43,6 +43,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <Prefer32Bit>false</Prefer32Bit>
+    <DocumentationFile>bin\WindowsGL\Release\FarseerPhysics MonoGame.xml</DocumentationFile>
   </PropertyGroup>
   <PropertyGroup>
     <ApplicationIcon>

Libraries/Farseer Physics Engine 3.5/Farseer Physics.csproj

@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>FarseerPhysics</RootNamespace>
     <AssemblyName>FarseerPhysics</AssemblyName>
-    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <SccProjectName>
     </SccProjectName>
@@ -39,6 +39,7 @@
     <IsWebBootstrapper>false</IsWebBootstrapper>
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -50,6 +51,7 @@
     <WarningLevel>4</WarningLevel>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
     <DocumentationFile>bin\Debug\FarseerPhysics.XML</DocumentationFile>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -60,6 +62,7 @@
     <WarningLevel>4</WarningLevel>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
     <DocumentationFile>bin\Release\FarseerPhysics.XML</DocumentationFile>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />