diff --git a/example-camera/example-camera.xcodeproj/project.pbxproj b/example-camera/example-camera.xcodeproj/project.pbxproj
index 97300fa..3b185e3 100644
--- a/example-camera/example-camera.xcodeproj/project.pbxproj
+++ b/example-camera/example-camera.xcodeproj/project.pbxproj
@@ -103,6 +103,7 @@
 		39C1244919EE9589005DF557 /* snappy-sinksource.cc in Sources */ = {isa = PBXBuildFile; fileRef = 39C1242A19EE9589005DF557 /* snappy-sinksource.cc */; };
 		39C1244A19EE9589005DF557 /* snappy-stubs-internal.cc in Sources */ = {isa = PBXBuildFile; fileRef = 39C1242C19EE9589005DF557 /* snappy-stubs-internal.cc */; };
 		39C1244B19EE9589005DF557 /* snappy.cc in Sources */ = {isa = PBXBuildFile; fileRef = 39C1242F19EE9589005DF557 /* snappy.cc */; };
+		39CF9C541C8A26FF00FDE473 /* DuplicateSurfaceCmd.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 39CF9C531C8A26FF00FDE473 /* DuplicateSurfaceCmd.cpp */; };
 		E4328149138ABC9F0047C5CB /* openFrameworksDebug.a in Frameworks */ = {isa = PBXBuildFile; fileRef = E4328148138ABC890047C5CB /* openFrameworksDebug.a */; };
 		E45BE97B0E8CC7DD009D7055 /* AGL.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E45BE9710E8CC7DD009D7055 /* AGL.framework */; };
 		E45BE97C0E8CC7DD009D7055 /* ApplicationServices.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E45BE9720E8CC7DD009D7055 /* ApplicationServices.framework */; };
@@ -366,6 +367,8 @@
 		39C1242F19EE9589005DF557 /* snappy.cc */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = snappy.cc; sourceTree = "<group>"; };
 		39C1243019EE9589005DF557 /* snappy.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = snappy.h; sourceTree = "<group>"; };
 		39C1243219EE9589005DF557 /* ofxIO.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ofxIO.h; sourceTree = "<group>"; };
+		39CF9C521C8A26FF00FDE473 /* DuplicateSurfaceCmd.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = DuplicateSurfaceCmd.h; sourceTree = "<group>"; };
+		39CF9C531C8A26FF00FDE473 /* DuplicateSurfaceCmd.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = DuplicateSurfaceCmd.cpp; sourceTree = "<group>"; };
 		BBAB23BE13894E4700AA2426 /* GLUT.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = GLUT.framework; path = ../../../libs/glut/lib/osx/GLUT.framework; sourceTree = "<group>"; };
 		E4328143138ABC890047C5CB /* openFrameworksLib.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = openFrameworksLib.xcodeproj; path = ../../../libs/openFrameworksCompiled/project/osx/openFrameworksLib.xcodeproj; sourceTree = SOURCE_ROOT; };
 		E45BE9710E8CC7DD009D7055 /* AGL.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = AGL.framework; path = /System/Library/Frameworks/AGL.framework; sourceTree = "<absolute>"; };
@@ -516,6 +519,8 @@
 				392196941C831B51009E169F /* StartDragSurfaceCmd.h */,
 				392196951C831B51009E169F /* TogglePerspectiveCmd.cpp */,
 				392196961C831B51009E169F /* TogglePerspectiveCmd.h */,
+				39CF9C521C8A26FF00FDE473 /* DuplicateSurfaceCmd.h */,
+				39CF9C531C8A26FF00FDE473 /* DuplicateSurfaceCmd.cpp */,
 			);
 			path = Commands;
 			sourceTree = "<group>";
@@ -1078,6 +1083,7 @@
 				392196E91C831B51009E169F /* SelPrevSurfaceCmd.cpp in Sources */,
 				392196E41C831B51009E169F /* RmGridRowCmd.cpp in Sources */,
 				39264843192224F90008A7F5 /* tinyxmlparser.cpp in Sources */,
+				39CF9C541C8A26FF00FDE473 /* DuplicateSurfaceCmd.cpp in Sources */,
 				3933D5D419BB87BD000ACA55 /* ofxButton.cpp in Sources */,
 				392196EC1C831B51009E169F /* SelSurfaceCmd.cpp in Sources */,
 				39C1244519EE9589005DF557 /* RecursiveDirectoryIterator.cpp in Sources */,