diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index bcc3d28..32e16e3 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -4,7 +4,9 @@
 from wireviz.DataClasses import Connector, Cable
 from graphviz import Graph
 from wireviz import wv_colors
-from wireviz.wv_helper import awg_equiv, mm2_equiv, tuplelist2tsv, nested, nested_html_table, flatten2d, index_if_list, html_line_breaks, graphviz_line_breaks, remove_line_breaks
+from wireviz.wv_helper import awg_equiv, mm2_equiv, tuplelist2tsv, nested, \
+    nested_html_table, flatten2d, index_if_list, html_line_breaks, \
+    graphviz_line_breaks, remove_line_breaks
 from collections import Counter
 from typing import List
 
@@ -27,7 +29,8 @@ class Harness:
 
     def connect(self, from_name, from_pin, via_name, via_pin, to_name, to_pin):
 
-        for (name, pin) in zip([from_name, to_name], [from_pin, to_pin]): # check from and to connectors
+        # check from and to connectors
+        for (name, pin) in zip([from_name, to_name], [from_pin, to_pin]):
             if name is not None and name in self.connectors:
                 connector = self.connectors[name]
                 if pin in connector.pinnumbers and pin in connector.pinout:
@@ -278,7 +281,7 @@ class Harness:
         data.seek(0)
         return data.read()
 
-    def output(self, filename, directory='_output', view=False, cleanup=True, fmt='pdf', gen_bom=False):
+    def output(self, filename, directory='_output', view=False, cleanup=True, fmt=('pdf', )):
         # graphical output
         graph = self.create_graph()
         for f in fmt:
diff --git a/src/wireviz/build_examples.py b/src/wireviz/build_examples.py
index 18654ef..e622941 100755
--- a/src/wireviz/build_examples.py
+++ b/src/wireviz/build_examples.py
@@ -16,7 +16,7 @@ if demos:
     for i in range(1,demos+1):
         fn = '../../examples/demo{:02d}.yml'.format(i)
         print(fn)
-        wireviz.parse_file(fn, generate_bom=True)
+        wireviz.parse_file(fn)
 
 if examples:
     with open(os.path.abspath('../../examples/readme.md'), 'w') as file:
@@ -24,7 +24,7 @@ if examples:
         for i in range(1,examples+1):
             fn = '../../examples/ex{:02d}.yml'.format(i)
             print(fn)
-            wireviz.parse_file(fn, generate_bom=True)
+            wireviz.parse_file(fn)
 
             file.write('## Example {:02d}\n'.format(i))
             file.write('![](ex{:02d}.png)\n\n'.format(i))
@@ -36,7 +36,7 @@ if tutorials:
         for i in range(1,tutorials+1):
             fn = '../../tutorial/tutorial{:02d}.yml'.format(i)
             print(fn)
-            wireviz.parse_file(fn, generate_bom=True)
+            wireviz.parse_file(fn)
 
             with open(os.path.abspath('../../tutorial/tutorial{:02d}.md'.format(i)), 'r') as info:
                 for line in info:
diff --git a/src/wireviz/wireviz.py b/src/wireviz/wireviz.py
index 465b389..e99f97f 100755
--- a/src/wireviz/wireviz.py
+++ b/src/wireviz/wireviz.py
@@ -15,13 +15,12 @@ if __name__ == '__main__':
 from wireviz.Harness import Harness
 
 
-def parse(yaml_input, file_out=None, generate_bom=False, return_types: (None, str, Tuple[str]) = None):
+def parse(yaml_input, file_out=None, return_types: (None, str, Tuple[str]) = None):
     """
     Parses yaml input string and does the high-level harness conversion
 
     :param yaml_input: a string containing the yaml input data
     :param file_out:
-    :param generate_bom:
     :param return_types: if None, then returns None; if the value is a string, then a
         corresponding data format will be returned; if the value is a tuple of strings,
         then for every valid format in the `return_types` tuple, another return type
@@ -194,7 +193,7 @@ def parse(yaml_input, file_out=None, generate_bom=False, return_types: (None, st
             raise Exception('Wrong number of connection parameters')
 
     if file_out is not None:
-        harness.output(filename=file_out, fmt=('png', 'svg'), gen_bom=generate_bom, view=False)
+        harness.output(filename=file_out, fmt=('png', 'svg'), view=False)
 
     if return_types is not None:
         returns = []
@@ -211,7 +210,7 @@ def parse(yaml_input, file_out=None, generate_bom=False, return_types: (None, st
         return tuple(returns) if len(returns) != 1 else returns[0]
 
 
-def parse_file(yaml_file, file_out=None, generate_bom=False):
+def parse_file(yaml_file, file_out=None):
     with open(yaml_file, 'r') as file:
         yaml_input = file.read()
 
@@ -220,7 +219,7 @@ def parse_file(yaml_file, file_out=None, generate_bom=False):
         file_out = fn
     file_out = os.path.abspath(file_out)
 
-    parse(yaml_input, file_out=file_out, generate_bom=generate_bom)
+    parse(yaml_input, file_out=file_out)
 
 
 def parse_cmdline():
@@ -261,7 +260,7 @@ def main():
         file_out = args.output_file
     file_out = os.path.abspath(file_out)
 
-    parse(yaml_input, file_out=file_out, generate_bom=args.generate_bom)
+    parse(yaml_input, file_out=file_out)
 
 
 if __name__ == '__main__':