Ticket #8562: 8562.patch

Code/Mantid/MantidQt/CustomInterfaces/src/SANSRunWindow.cpp

@@ -2018 +2018 @@
     exec_reduce += ", False";
   }
   exec_reduce += ")\n";
+  if ( ( m_uiForm.enableRearFlood_ck->isChecked() && (!m_uiForm.floodRearFile->isValid()) ) ||
+       ( m_uiForm.enableFrontFlood_ck->isChecked() && (!m_uiForm.floodFrontFile->isValid()) )
+       )
+    {
+      throw std::runtime_error("Invalid flood file. Please, check the path given to the Flood file in Reduction Settings tab.");       
+    }  
   QString floodRearFile =
     m_uiForm.enableRearFlood_ck->isChecked() ? m_uiForm.floodRearFile->getFirstFilename().trimmed() : "";
   QString floodFrontFile =