diff --git a/Fltk/onelabWindow.cpp b/Fltk/onelabWindow.cpp
index a893c27bc34c433e9cf33f25a8227a33de5e9021..da5b2f7fc98dbb0267b08586b4dddcf183888a57 100644
--- a/Fltk/onelabWindow.cpp
+++ b/Fltk/onelabWindow.cpp
@@ -131,6 +131,7 @@ static void mergePostProcessingFile(const std::string &fileName)
   }
   MergeFile(fileName);
   GModel::setCurrent(old);
+  old->setVisibility(1);
 
   // hide everything except the onelab X-Y graphs
   if(FlGui::instance()->onelab->hideNewViews()){