diff --git a/PartPreviewWindow/ViewGcodeBasic.cs b/PartPreviewWindow/ViewGcodeBasic.cs
index 42ad91b43..50980a297 100644
--- a/PartPreviewWindow/ViewGcodeBasic.cs
+++ b/PartPreviewWindow/ViewGcodeBasic.cs
@@ -239,7 +239,6 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 					if (File.Exists(printItem.FileLocation))
 					{
 						string gcodePathAndFileName = printItem.GetGCodePathAndFileName();
-						bool gcodeFileIsComplete = printItem.IsGCodeFileComplete(gcodePathAndFileName);
 
 						if (printItem.SlicingHadError)
 						{
@@ -250,7 +249,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 							firstProcessingMessage = pressGenerateMessage;
 						}
 
-						if (File.Exists(gcodePathAndFileName) && gcodeFileIsComplete)
+						if (File.Exists(gcodePathAndFileName))
 						{
 							gcodeDisplayWidget.AddChild(CreateGCodeViewWidget(gcodePathAndFileName));
 						}
diff --git a/Queue/PrintItemWrapper.cs b/Queue/PrintItemWrapper.cs
index a733dd628..8d47a979d 100644
--- a/Queue/PrintItemWrapper.cs
+++ b/Queue/PrintItemWrapper.cs
@@ -278,42 +278,9 @@ namespace MatterHackers.MatterControl.PrintQueue
 			}
 		}
 
-		public bool IsGCodeFileComplete(string gcodePathAndFileName)
-		{
-			if (Path.GetExtension(FileLocation).ToUpper() == ".GCODE")
-			{
-				return true;
-			}
-
-			bool gCodeFileIsComplete = false;
-			if (File.Exists(gcodePathAndFileName))
-			{
-				string gcodeFileContents = "";
-				using (FileStream fileStream = new FileStream(gcodePathAndFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
-				{
-					using (StreamReader gcodeStreamReader = new StreamReader(fileStream))
-					{
-						gcodeFileContents = gcodeStreamReader.ReadToEnd();
-					}
-				}
-
-				// check if there is a known line at the end of the file (this will let us know if slicer finished building the file).
-				if (gcodeFileContents.Contains("filament used ="))
-				{
-					gCodeFileIsComplete = true;
-				}
-			}
-
-			return gCodeFileIsComplete;
-		}
-
 		public void OnSlicingOutputMessage(EventArgs e)
 		{
-			StringEventArgs message = e as StringEventArgs;
-			if (SlicingOutputMessage != null)
-			{
-				SlicingOutputMessage(this, message);
-			}
+			SlicingOutputMessage?.Invoke(this, e as StringEventArgs);
 		}
 	}
 }
\ No newline at end of file
diff --git a/SlicerConfiguration/SlicingQueue.cs b/SlicerConfiguration/SlicingQueue.cs
index e3c3618fc..c73d3a02c 100644
--- a/SlicerConfiguration/SlicingQueue.cs
+++ b/SlicerConfiguration/SlicingQueue.cs
@@ -348,14 +348,14 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 							itemCurrentlySlicing = itemToSlice;
 							MatterHackers.MatterSlice.LogOutput.GetLogWrites += SendProgressToItem;
 
-							SliceFile(itemToSlice.FileLocation, gcodeFilePath, itemToSlice.IsGCodeFileComplete(gcodeFilePath), reporter);
+							SliceFile(itemToSlice.FileLocation, gcodeFilePath, reporter);
 
 							MatterHackers.MatterSlice.LogOutput.GetLogWrites -= SendProgressToItem;
 							itemCurrentlySlicing = null;
 						}
 						else
 						{
-							SliceFile(itemToSlice.FileLocation, gcodeFilePath, itemToSlice.IsGCodeFileComplete(gcodeFilePath), reporter);
+							SliceFile(itemToSlice.FileLocation, gcodeFilePath, reporter);
 						}
 					}
 
@@ -382,30 +382,27 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 			await Task.Run(() => SliceFile(
 				printItem.FileLocation, 
 				gcodeFilePath, 
-				printItem.IsGCodeFileComplete(gcodeFilePath), 
 				progressReporter));
 		}
 
-		public static async Task SliceFileAsync(string sourceFile, string gcodeFilePath, bool gcodeFileIsComplete, IProgress<string> progressReporter)
+		public static async Task SliceFileAsync(string sourceFile, string gcodeFilePath, IProgress<string> progressReporter)
 		{
-			await Task.Run(() => SliceFile(sourceFile, gcodeFilePath, gcodeFileIsComplete, progressReporter));
+			await Task.Run(() => SliceFile(sourceFile, gcodeFilePath, progressReporter));
 		}
 
-		private static void SliceFile(string sourceFile, string gcodeFilePath, bool gcodeFileIsComplete, IProgress<string> progressReporter)
+		private static void SliceFile(string sourceFile, string gcodeFilePath, IProgress<string> progressReporter)
 		{
 			string mergeRules = "";
 
 			string[] stlFileLocations = GetStlFileLocations(sourceFile, ref mergeRules);
 			string fileToSlice = stlFileLocations[0];
 
-			// check that the STL file is currently on disk
-			if (File.Exists(fileToSlice))
 			{
 				string configFilePath = Path.Combine(
 					ApplicationDataStorage.Instance.GCodeOutputPath,
 					string.Format("config_{0}.ini", ActiveSliceSettings.Instance.GetLongHashCode().ToString()));
 
-				if (!File.Exists(gcodeFilePath) || !gcodeFileIsComplete)
+				if (!File.Exists(gcodeFilePath))
 				{
 					string commandArgs;