Index: /trunk/BNC/src/bncwindow.cpp
===================================================================
--- /trunk/BNC/src/bncwindow.cpp	(revision 5927)
+++ /trunk/BNC/src/bncwindow.cpp	(revision 5928)
@@ -1647,5 +1647,7 @@
   if      ( _pppWidgets._dataSource->currentText() == "RINEX Files") {
     _runningPostProcessingPPP = true;
-    BNC_CORE->startPPP(true);
+    _actStart->setEnabled(false);
+    BNC_CORE->startPPP(false);
+    _actStart->setEnabled(true);
   }
   else if ( !_reqcActionComboBox->currentText().isEmpty() ) {