2 files changed, 13 insertions, 21 deletions
diff --git a/Software/Visual_Studio/Tango.BL/Entities/BrushStop.cs b/Software/Visual_Studio/Tango.BL/Entities/BrushStop.cs
index 41ebbee7c..a8d94ff8c 100644
--- a/Software/Visual_Studio/Tango.BL/Entities/BrushStop.cs
+++ b/Software/Visual_Studio/Tango.BL/Entities/BrushStop.cs
@@ -506,11 +506,15 @@ namespace Tango.BL.Entities
         {
             LiquidVolumes = new ObservableCollection<LiquidVolume>();
 
-            foreach (var idsPack in configuration.GetSupportedIdsPacks(rml))
+
+            lock (LiquidVolumes)
             {
-                var liquidVolume = new LiquidVolume(configuration, idsPack, rml, processParametersTable, this);
-                liquidVolume.VolumeChanged += LiquidVolume_VolumeChanged;
-                LiquidVolumes.Add(liquidVolume);
+                foreach (var idsPack in configuration.GetSupportedIdsPacks(rml))
+                {
+                    var liquidVolume = new LiquidVolume(configuration, idsPack, rml, processParametersTable, this);
+                    liquidVolume.VolumeChanged += LiquidVolume_VolumeChanged;
+                    LiquidVolumes.Add(liquidVolume);
+                } 
             }
 
             foreach (var volume in LiquidVolumes.ToList())
diff --git a/Software/Visual_Studio/Tango.BL/LiquidVolume.cs b/Software/Visual_Studio/Tango.BL/LiquidVolume.cs
index 014ca040a..5b4cec488 100644
--- a/Software/Visual_Studio/Tango.BL/LiquidVolume.cs
+++ b/Software/Visual_Studio/Tango.BL/LiquidVolume.cs
@@ -14,7 +14,6 @@ namespace Tango.BL
     public class LiquidVolume : ExtendedObject
     {
         public event Action VolumeChanged;
-        private static object _lock = new object();
 
         private BrushStop _brushStop;
         [JsonIgnore]
@@ -83,25 +82,14 @@ namespace Tango.BL
 
         public void Invalidate()
         {
-            lock (_lock)
+            if (BrushStop.LiquidVolumes != null)
             {
-                try
-                {
-                    if (BrushStop.LiquidVolumes != null)
-                    {
-                        InvalidateSolo();
+                InvalidateSolo();
 
-                        foreach (var liquidVolume in BrushStop.LiquidVolumes.ToList().Where(x => x != this))
-                        {
-                            liquidVolume.InvalidateSolo();
-                        }
-                    }
-                }
-                catch (Exception ex)
+                foreach (var liquidVolume in BrushStop.LiquidVolumes.ToList().Where(x => x != this))
                 {
-
-                    throw;
-                } 
+                    liquidVolume.InvalidateSolo();
+                }
             }
         }