diff --git a/TestBenchFramework/BenchControl/Elde/ControlComWrap.cs b/TestBenchFramework/BenchControl/Elde/ControlComWrap.cs
index 37fbf918f..680efc7df 100644
--- a/TestBenchFramework/BenchControl/Elde/ControlComWrap.cs
+++ b/TestBenchFramework/BenchControl/Elde/ControlComWrap.cs
@@ -62,7 +62,11 @@ namespace TBF.BenchControl.Elde
 		public uint AnalogInputRaw(int adcNr0, int bank) { return ctrlBrdComponent.AnalogyRaw[adcNr0, bank]; }	/// bank0=RV, bank1=Temp
 		public float ReferenceVolume { get { return ctrlBrdComponent.ReferenceVolume; } }
 		public float VyslExt(int wmNr0, int what) { return ctrlBrdComponent.VyslExt[wmNr0, what]; }
-        public void SetWeight(int pos, float mass) { ctrlBrdComponent.Weight[pos] = mass; }
+        public void SetWeight(int pos, float mass)
+        { 
+            ctrlBrdComponent.Weight[pos] = mass;
+            log.DebugFormat("ControlComWrap . . . . . Weight[{0}] = {1}", pos, mass);
+        }
 
 
         ///
diff --git a/TestBenchFramework/BenchControl/Sequences/MainSeq.cs b/TestBenchFramework/BenchControl/Sequences/MainSeq.cs
index 9fb02828f..b02b452a0 100644
--- a/TestBenchFramework/BenchControl/Sequences/MainSeq.cs
+++ b/TestBenchFramework/BenchControl/Sequences/MainSeq.cs
@@ -252,11 +252,13 @@ namespace TBF.BenchControl.Sequences
 
                     /// Try to fetch all test paths and transitions
                     /// to detect configuration errors as early as possible.
+                    string errorMsg;
                     if (!StateMachine.GetPaths(test, out inPath, out benchPath,
                                                      out outPath, out sensPath,
-                                                     out transitionStart, out transitionStop))
+                                                     out transitionStart, out transitionStop,
+                                                     out errorMsg))
                     {
-						UiBridge.Bridge.OnError(this, string.Format("Cannot load paths"));
+						UiBridge.Bridge.OnError(this, errorMsg);
 						goto select_cycle_or_test;
                     }
                 }
@@ -265,11 +267,13 @@ namespace TBF.BenchControl.Sequences
                 foreach (var test in StateMachine.Tests)
                 {
                     /// Fetch the test paths and transitions
+                    string errorMsg;
                     if (!StateMachine.GetPaths(test, out inPath, out benchPath,
                                                      out outPath, out sensPath,
-                                                     out transitionStart, out transitionStop))
+                                                     out transitionStart, out transitionStop,
+                                                     out errorMsg))
                     {
-						UiBridge.Bridge.OnError(this, string.Format("Cannot load paths"));
+                        UiBridge.Bridge.OnError(this, errorMsg);
 						goto select_cycle_or_test;
                     }
 
@@ -304,13 +308,20 @@ namespace TBF.BenchControl.Sequences
             else
             {
 				Entities.Test test = StateMachine.GetTest(selection);
+                if (test == null)
+                {
+                    UiBridge.Bridge.OnError(this, string.Format("No test specified"));
+                    goto select_cycle_or_test;
+                }
 
                 /// Fetch the test paths and transitions
+                string errorMsg;
                 if (!StateMachine.GetPaths(test, out inPath,  out benchPath,
                                                  out outPath, out sensPath,
-                                                 out transitionStart, out transitionStop))
+                                                 out transitionStart, out transitionStop,
+                                                 out errorMsg))
                 {
-					UiBridge.Bridge.OnError(this, string.Format("Cannot load paths"));
+                    UiBridge.Bridge.OnError(this, errorMsg);
 					goto select_cycle_or_test;
 				}
 
diff --git a/TestBenchFramework/BenchControl/StateMachine.cs b/TestBenchFramework/BenchControl/StateMachine.cs
index 6d4b55f1f..06cf73313 100644
--- a/TestBenchFramework/BenchControl/StateMachine.cs
+++ b/TestBenchFramework/BenchControl/StateMachine.cs
@@ -386,8 +386,13 @@ namespace TBF.BenchControl
 		/// <param name="pmtrs"></param>
 		/// <returns>true when all four paths are defined (non null)</returns>
 		public static bool GetPaths(Entities.Test test,
-									out FeedingPath pfeed, out BenchPath pben, out OutputPath pout, out MetersPath pmtrs,
-									out Entities.TransitionSequence transitionStart, out Entities.TransitionSequence transitionEnd)
+									out FeedingPath pfeed,
+                                    out BenchPath pben,
+                                    out OutputPath pout,
+                                    out MetersPath pmtrs,
+									out Entities.TransitionSequence transitionStart,
+                                    out Entities.TransitionSequence transitionEnd,
+                                    out string errorMsg)
 		{
 			pfeed = null;
 			pben = null;
@@ -434,7 +439,26 @@ namespace TBF.BenchControl
 				if (transition.Name == test.TransitionEnd)   transitionEnd = transition;
 			}
 
-			return (pfeed != null) && (pben != null) && (pout != null) && (pmtrs != null);
+			if ((pfeed == null) || (pben == null) || (pout == null) || (pmtrs == null))
+			{
+				errorMsg = "Cannot load paths";
+				return false;
+			}
+
+            if (pout.Balance == null)
+            {
+                errorMsg = string.Format("No balance specified in path {0}", test.OutputPath);
+                return false;
+            }
+
+			if (Program.LocalSettings.RealDensity < 500.0f || Program.LocalSettings.RealDensity > 2000.0f)
+			{
+				errorMsg = string.Format("Density was not specified");
+				return false;
+			}
+
+            errorMsg = string.Empty;
+            return true;
 		}
 
 		/// <summary>