diff --git a/main.py b/main.py
index dba3165..3492dd9 100644
--- a/main.py
+++ b/main.py
@@ -44,7 +44,7 @@ def main(driver: WebDriver, logger = logging.getLogger('main')):
     except Exception as e:
         logger.critical('Unable to load starup page', exc_info=e)
         return 2
-    
+
     try:
         driver.switch_to.new_window('tab')
         driver.set_page_load_timeout(parameters['timeout'])
@@ -141,17 +141,16 @@ def main(driver: WebDriver, logger = logging.getLogger('main')):
         except Exception as e:
             logger.critical('Unable to load input data', exc_info=e)
             return 6
-        
+
         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)
@@ -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: