From 007bcbdc7f08d9904f03142be48768e142d4d49e Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Fri, 16 May 2014 15:34:26 +0200
Subject: [PATCH] + fix crash in CmdSketcherMapSketch

---
 src/Mod/Sketcher/Gui/Command.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Sketcher/Gui/Command.cpp b/src/Mod/Sketcher/Gui/Command.cpp
index 9665f6a89..3965b890d 100644
--- a/src/Mod/Sketcher/Gui/Command.cpp
+++ b/src/Mod/Sketcher/Gui/Command.cpp
@@ -299,7 +299,14 @@ void CmdSketcherMapSketch::activated(int iMsg)
         Part::Feature *part = static_cast<Part::Feature*>(FaceFilter.Result[0][0].getObject());
         Base::Placement ObjectPos = part->Placement.getValue();
         const std::vector<std::string> &sub = FaceFilter.Result[0][0].getSubNames();
-        if (sub.size() > 1){
+        if (sub.empty()) {
+            // No assert for wrong user input!
+            QMessageBox::warning(Gui::getMainWindow(),
+                qApp->translate(className(),"No sub-elements selected"),
+                qApp->translate(className(),"You have to select a single face as support for a sketch!"));
+            return;
+        }
+        else if (sub.size() > 1) {
             // No assert for wrong user input!
             QMessageBox::warning(Gui::getMainWindow(),
                 qApp->translate(className(),"Several sub-elements selected"),