Index: /branches/BNC_2.12/src/rinex/rnxobsfile.cpp
===================================================================
--- /branches/BNC_2.12/src/rinex/rnxobsfile.cpp	(revision 7894)
+++ /branches/BNC_2.12/src/rinex/rnxobsfile.cpp	(revision 7895)
@@ -585,8 +585,10 @@
   }
 
-  *stream << QString("%1")
-    .arg(_markerType, -60)
-    .leftJustified(60)
-           << "MARKER TYPE\n";
+  if (_version >= 3.0) {
+    *stream << QString("%1")
+      .arg(_markerType, -60)
+      .leftJustified(60)
+             << "MARKER TYPE\n";
+  }
 
   *stream << QString("%1%2")