Merge pull request #19250 from mantidproject/19245_Error_processing_with_IPython_notebook

ISIS Reflectometry GUI: Fixed bug where unexpected error was thrown when processing with output notebook option

MantidQt/MantidWidgets/src/DataProcessorUI/DataProcessorGenerateNotebook.cpp

@@ -463,7 +463,9 @@ boost::tuple<std::string, std::string> reduceRowString(
         const DataProcessorPreprocessingAlgorithm preprocessor =
             preprocessMap.at(colName);
         // The pre-processing options
-        const std::string options = preprocessingOptionsMap.at(colName);
+        const std::string options = preprocessingOptionsMap.count(colName) > 0
+                                        ? preprocessingOptionsMap.at(colName)
+                                        : "";
         // Python code ran to load and pre-process runs
         const boost::tuple<std::string, std::string> load_ws_string =
             loadWorkspaceString(runStr, instrument, preprocessor, options);

MantidQt/MantidWidgets/src/DataProcessorUI/GenericDataProcessorPresenter.cpp

@@ -629,11 +629,12 @@ GenericDataProcessorPresenter::reduceRow(const std::vector<std::string> &data) {
         restrictedProps.insert(prop);
       }
 
-      auto preprocessor = m_preprocessMap[columnName];
+      auto preprocessor = m_preprocessMap.at(columnName);
 
       // Global pre-processing options for this algorithm as a string
-      const std::string options = globalOptions[columnName];
-
+      const std::string options = globalOptions.count(columnName) > 0
+                                      ? globalOptions.at(columnName)
+                                      : "";
       auto optionsMap = parseKeyValueString(options);
       auto runWS =
           prepareRunWorkspace(preProcessValue, preprocessor, optionsMap);