2 files changed, 2 insertions, 2 deletions
diff --git a/mainwin.cc b/mainwin.cc
index 96dd0d2..bf26c8a 100644
--- a/mainwin.cc
+++ b/mainwin.cc
@@ -910,7 +910,7 @@ void MainWindow::actionExportSTLorOFF(bool)
 	}
 
 	if (!root_N->is_simple()) {
-		PRINT("Object isn't a single polyhedron or otherwise invalid! Modify your design..");
+		PRINT("Object isn't a valid 2-manifold! Modify your design..");
 		current_win = NULL;
 		return;
 	}
diff --git a/render.cc b/render.cc
index 3bb07de..db891dd 100644
--- a/render.cc
+++ b/render.cc
@@ -152,7 +152,7 @@ CSGTerm *RenderNode::render_csg_term(double m[16], QVector<CSGTerm*> *highlights
 	}
 
 	if (!N.is_simple()) {
-		PRINTF("WARNING: Result of render() isn't a single polyhedron or otherwise invalid! Modify your design..");
+		PRINTF("WARNING: Result of render() isn't valid 2-manifold! Modify your design..");
 		return NULL;
 	}