Refs #6568 add remove-used-banks parameter

Code/Mantid/Framework/DataHandling/src/LoadEventNexus.cpp

@@ -1516,10 +1516,10 @@ void LoadEventNexus::loadEvents(API::Progress * const prog, const bool monitors)
   }
 
   prog->report("Initializing all pixels");
-
+  // Remove used banks if parameter is set
+  if (WS->getInstrument()->hasParameter("remove-unused-banks")) deleteBanks(WS, bankNames);
   //----------------- Pad Empty Pixels -------------------------------
   // Create the required spectra mapping so that the workspace knows what to pad to
-  deleteBanks(WS, bankNames);
   createSpectraMapping(m_filename, WS, monitors, onebank);
   WS->padSpectra();
 

Code/Mantid/instrument/TOPAZ_Parameters.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<parameter-file instrument = "TOPAZ" date = "2012-08-23T00:00:01">
+
+<component-link name = "TOPAZ">
+
+<!-- Specify that any banks not in NeXus file are to be removed -->
+<parameter name="remove-unused-banks">
+  <value val="1"/>
+</parameter>
+
+</component-link>
+
+</parameter-file>
+