Index: trunk/BNC/bncapp.cpp
===================================================================
--- trunk/BNC/bncapp.cpp	(revision 2406)
+++ trunk/BNC/bncapp.cpp	(revision 2407)
@@ -42,5 +42,4 @@
 #include <QMessageBox>
 #include <cmath>
-#include <unistd.h>
 
 #include "bncapp.h" 
@@ -716,6 +715,8 @@
     bncSettings settings;
     QString rawOutFileName = settings.value("rawOutFile").toString();
-    _rawOutFile = new QFile(rawOutFileName);
-    _rawOutFile->open(QIODevice::WriteOnly);
+    if (!rawOutFileName.isEmpty()) {
+      _rawOutFile = new QFile(rawOutFileName);
+      _rawOutFile->open(QIODevice::WriteOnly);
+    }
   }