diff --git a/src/Application/TextureMappingState.cpp b/src/Application/TextureMappingState.cpp
index 56a0037..20f0d6a 100644
--- a/src/Application/TextureMappingState.cpp
+++ b/src/Application/TextureMappingState.cpp
@@ -30,6 +30,10 @@ void TextureMappingState::onKeyPressed(Application * app, ofKeyEventArgs & args)
 		 break;
 	 
 	 case ' ':
+		 if(app->getSurfaceManager()->getSelectedSurface() == 0){
+			return;
+		 }
+		 
          if(app->getSurfaceManager()->getSelectedSurface()->getSource()->getType() ==
             SourceType::SOURCE_TYPE_VIDEO){
             app->getCmdManager()->exec(