Index: /trunk/FACT++/src/Fits.cc
===================================================================
--- /trunk/FACT++/src/Fits.cc	(revision 13204)
+++ /trunk/FACT++/src/Fits.cc	(revision 13205)
@@ -64,4 +64,10 @@
     fDataFormats = dataFormat;
     fDataPointer = dataPointer;
+
+    if ((desc.size() == 0) && (dataFormat.size() == 0))
+    {
+        fDataColDesc.clear();
+        return;
+    }
 
     //we will copy this information here. It duplicates the data, which is not great,