diff --git a/src/wix/WixToolset.Core/HarvestFilesCommand.cs b/src/wix/WixToolset.Core/HarvestFilesCommand.cs
index a8c716d04..6927f741c 100644
--- a/src/wix/WixToolset.Core/HarvestFilesCommand.cs
+++ b/src/wix/WixToolset.Core/HarvestFilesCommand.cs
@@ -52,28 +52,19 @@ private void HarvestFiles(HarvestFilesSymbol harvestFile, IntermediateSection se
 
             var resolvedFiles = Enumerable.Empty<WildcardFile>();
 
-            try
-            {
-                var included = this.GetWildcardFiles(harvestFile, inclusions);
-                var excluded = this.GetWildcardFiles(harvestFile, exclusions);
+            var included = this.GetWildcardFiles(harvestFile, inclusions);
+            var excluded = this.GetWildcardFiles(harvestFile, exclusions);
 
-                foreach (var excludedFile in excluded)
-                {
-                    this.Messaging.Write(OptimizerVerboses.ExcludedFile(harvestFile.SourceLineNumbers, excludedFile.Path));
-                }
+            foreach (var excludedFile in excluded)
+            {
+                this.Messaging.Write(OptimizerVerboses.ExcludedFile(harvestFile.SourceLineNumbers, excludedFile.Path));
+            }
 
-                resolvedFiles = included.Except(excluded, comparer).ToList();
+            resolvedFiles = included.Except(excluded, comparer).ToList();
 
-                if (!resolvedFiles.Any())
-                {
-                    this.Messaging.Write(OptimizerWarnings.ZeroFilesHarvested(harvestFile.SourceLineNumbers));
-                }
-            }
-            catch (DirectoryNotFoundException e)
+            if (!resolvedFiles.Any())
             {
-                this.Messaging.Write(OptimizerWarnings.ExpectedDirectory(harvestFile.SourceLineNumbers, e.Message));
-
-                return;
+                this.Messaging.Write(OptimizerWarnings.ZeroFilesHarvested(harvestFile.SourceLineNumbers));
             }
 
             foreach (var fileByRecursiveDir in resolvedFiles.GroupBy(resolvedFile => resolvedFile.RecursiveDir, resolvedFile => resolvedFile.Path))
@@ -139,48 +130,53 @@ private IEnumerable<WildcardFile> GetWildcardFiles(HarvestFilesSymbol harvestFil
 
             var files = new List<WildcardFile>();
 
-            foreach (var pattern in patterns)
+            try
             {
-                // Resolve bind paths, if any, which might result in multiple directories.
-                foreach (var path in this.ResolveBindPaths(sourceLineNumbers, pattern))
+                foreach (var pattern in patterns)
                 {
-                    var sourceDirectory = String.IsNullOrEmpty(sourcePath) ? Path.GetDirectoryName(sourceLineNumbers.FileName) : sourcePath;
-                    var recursive = path.IndexOf("**") >= 0;
-                    var filePortion = Path.GetFileName(path);
-                    var directoryPortion = Path.GetDirectoryName(path);
-
-                    if (directoryPortion?.EndsWith(@"\**") == true)
+                    // Resolve bind paths, if any, which might result in multiple directories.
+                    foreach (var path in this.ResolveBindPaths(sourceLineNumbers, pattern))
                     {
-                        directoryPortion = directoryPortion.Substring(0, directoryPortion.Length - 3);
-                    }
+                        var sourceDirectory = String.IsNullOrEmpty(sourcePath) ? Path.GetDirectoryName(sourceLineNumbers.FileName) : sourcePath;
+                        var recursive = path.IndexOf("**") >= 0;
+                        var filePortion = Path.GetFileName(path);
+                        var directoryPortion = Path.GetDirectoryName(path).TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
 
-                    var recursiveDirOffset = directoryPortion.Length + 1;
+                        if (directoryPortion?.EndsWith(@"\**") == true)
+                        {
+                            directoryPortion = directoryPortion.Substring(0, directoryPortion.Length - 3);
+                        }
 
-                    if (directoryPortion is null || directoryPortion.Length == 0 || directoryPortion == "**")
-                    {
-                        directoryPortion = sourceDirectory;
-                        recursiveDirOffset = sourceDirectory.Length + 1;
+                        if (directoryPortion is null || directoryPortion.Length == 0 || directoryPortion == "**")
+                        {
+                            directoryPortion = sourceDirectory;
 
-                    }
-                    else if (!Path.IsPathRooted(directoryPortion))
-                    {
-                        directoryPortion = Path.Combine(sourceDirectory, directoryPortion);
-                        recursiveDirOffset = directoryPortion.Length + 1;
-                    }
+                        }
+                        else if (!Path.IsPathRooted(directoryPortion))
+                        {
+                            directoryPortion = Path.Combine(sourceDirectory, directoryPortion);
+                        }
 
-                    var foundFiles = Directory.EnumerateFiles(directoryPortion, filePortion, recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly);
+                        var recursiveDirOffset = directoryPortion.Length + 1;
 
-                    foreach (var foundFile in foundFiles)
-                    {
-                        var recursiveDir = Path.GetDirectoryName(foundFile.Substring(recursiveDirOffset));
-                        files.Add(new WildcardFile()
+                        var foundFiles = Directory.EnumerateFiles(directoryPortion, filePortion, recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly);
+
+                        foreach (var foundFile in foundFiles)
                         {
-                            RecursiveDir = recursiveDir,
-                            Path = foundFile,
-                        });
+                            var recursiveDir = Path.GetDirectoryName(foundFile.Substring(recursiveDirOffset));
+                            files.Add(new WildcardFile()
+                            {
+                                RecursiveDir = recursiveDir,
+                                Path = foundFile,
+                            });
+                        }
                     }
                 }
             }
+            catch (DirectoryNotFoundException e)
+            {
+                this.Messaging.Write(OptimizerWarnings.ExpectedDirectory(harvestFile.SourceLineNumbers, e.Message));
+            }
 
             return files;
         }
diff --git a/src/wix/test/WixToolsetTest.CoreIntegration/HarvestFilesFixture.cs b/src/wix/test/WixToolsetTest.CoreIntegration/HarvestFilesFixture.cs
index 7da47f6b3..e189c42db 100644
--- a/src/wix/test/WixToolsetTest.CoreIntegration/HarvestFilesFixture.cs
+++ b/src/wix/test/WixToolsetTest.CoreIntegration/HarvestFilesFixture.cs
@@ -48,7 +48,9 @@ public void MissingHarvestDirectoryIsAWarning()
                 Assert.Equal(new[]
                 {
                     8601,
+                    8600,
                     8601,
+                    8600,
                 }, messages);
             });
         }
@@ -272,7 +274,11 @@ public void CanHarvestFilesInStandardDirectory()
                 @"flsCgt3Noa1VJHlHG5HOVjD5vdJm5Q=PFiles\MsiPackage\files2_sub3\FileName.Extension",
             };
 
-            Build("StandardDirectory.wxs", (msiPath, _) => AssertFileIdsAndTargetPaths(msiPath, expected));
+            Build("StandardDirectory.wxs", (msiPath, result) =>
+            {
+                result.AssertSuccess();
+                AssertFileIdsAndTargetPaths(msiPath, expected);
+            }, warningsAsErrors: false);
         }
 
         [Fact]
@@ -319,7 +325,7 @@ private static void AssertFileIdsAndTargetPaths(string msiPath, string[] expecte
             Assert.Equal(sortedExpected, actual);
         }
 
-        private static void Build(string file, Action<string, WixRunnerResult> tester, bool isPackage = true, params string[] additionalCommandLineArguments)
+        private static void Build(string file, Action<string, WixRunnerResult> tester, bool isPackage = true, bool warningsAsErrors = true, params string[] additionalCommandLineArguments)
         {
             var folder = TestData.Get("TestData", "HarvestFiles");
 
@@ -346,7 +352,7 @@ private static void Build(string file, Action<string, WixRunnerResult> tester, b
                     arguments.AddRange(additionalCommandLineArguments);
                 }
 
-                var result = WixRunner.Execute(arguments.ToArray());
+                var result = WixRunner.Execute(warningsAsErrors, arguments.ToArray());
 
                 tester(msiPath, result);
             }
diff --git a/src/wix/test/WixToolsetTest.CoreIntegration/TestData/HarvestFiles/StandardDirectory.wxs b/src/wix/test/WixToolsetTest.CoreIntegration/TestData/HarvestFiles/StandardDirectory.wxs
index 1838ed66b..8b30e1185 100644
--- a/src/wix/test/WixToolsetTest.CoreIntegration/TestData/HarvestFiles/StandardDirectory.wxs
+++ b/src/wix/test/WixToolsetTest.CoreIntegration/TestData/HarvestFiles/StandardDirectory.wxs
@@ -5,7 +5,9 @@
         <StandardDirectory Id="ProgramFiles6432Folder">
             <!-- Relies on default-feature feature to include naked files in package. -->
             <Files Subdirectory="MsiPackage" Include="files1\**" />
-            <Files Subdirectory="MsiPackage" Include="files2\**" />
+            <Files Subdirectory="MsiPackage" Include="files2\**">
+                <Exclude Files="notfound\**" />
+            </Files>
         </StandardDirectory>
     </Package>
 </Wix>