fix: moved faillable statements into a try block

main.py

@@ -145,14 +145,13 @@ def main(driver: WebDriver, logger = logging.getLogger('main')):
         try:
             file = Path('template.xlsx').resolve()
             template = openpyxl.load_workbook(file)
+            header = next(data)
+            source = template.active
+            output = BytesIO()
         except Exception as e:
             logger.critical('Unable to load template excel', exc_info=e)
             return 7
 
-        header = next(data, None)
-        source = template.active
-        output = BytesIO()
-
         def preprocess(data: str):
             try: return float(data)
             except ValueError: pass
@@ -172,7 +171,7 @@ def main(driver: WebDriver, logger = logging.getLogger('main')):
                     source[coord] = value
 
             sheet = template.copy_worksheet(source)
-            sheet.title = 'Copy'
+            sheet.title = "COPY"
             logger.debug('%s', sheet.title)
 
         if not len(template.worksheets) > 1: