diff --git a/gnpy/tools/cli_examples.py b/gnpy/tools/cli_examples.py
index 3b14dcdb..0f72b9cb 100644
--- a/gnpy/tools/cli_examples.py
+++ b/gnpy/tools/cli_examples.py
@@ -9,7 +9,6 @@ Common code for CLI examples
 '''
 
 import argparse
-from json import dumps
 import logging
 import os.path
 import sys
diff --git a/gnpy/tools/convert.py b/gnpy/tools/convert.py
index 756ebf3e..bd468948 100755
--- a/gnpy/tools/convert.py
+++ b/gnpy/tools/convert.py
@@ -694,8 +694,6 @@ def connect_eqpt(from_, in_, to_):
 
 def eqpt_in_city_to_city(in_city, to_city, direction='east'):
     rev_direction = 'west' if direction == 'east' else 'east'
-    amp_direction = f'{direction}_amp_type'
-    amp_rev_direction = f'{rev_direction}_amp_type'
     return_eqpt = ''
     if in_city in eqpts_by_city:
         for e in eqpts_by_city[in_city]:
@@ -705,7 +703,6 @@ def eqpt_in_city_to_city(in_city, to_city, direction='east'):
             elif nodes_by_city[in_city].node_type.lower() == 'ila':
                 if e.to_city != to_city:
                     direction = rev_direction
-                    amp_direction = amp_rev_direction
                 return_eqpt = f'{direction} edfa in {e.from_city} to {e.to_city}'
     elif nodes_by_city[in_city].node_type.lower() == 'ila':
         return_eqpt = f'{direction} edfa in {in_city}'
diff --git a/gnpy/tools/json_io.py b/gnpy/tools/json_io.py
index 1b60baf6..916c3a39 100644
--- a/gnpy/tools/json_io.py
+++ b/gnpy/tools/json_io.py
@@ -534,10 +534,9 @@ def convert_service_sheet(
         network,
         network_filename=None,
         output_filename='',
-        bidir=False,
-        filter_region=None):
+        bidir=False):
     if output_filename == '':
         output_filename = f'{str(input_filename)[0:len(str(input_filename))-len(str(input_filename.suffixes[0]))]}_services.json'
-    data = read_service_sheet(input_filename, eqpt, network, network_filename, bidir, filter_region)
+    data = read_service_sheet(input_filename, eqpt, network, network_filename, bidir)
     save_json(data, output_filename)
     return data
diff --git a/gnpy/tools/service_sheet.py b/gnpy/tools/service_sheet.py
index 6d4eb829..cf4c4b74 100644
--- a/gnpy/tools/service_sheet.py
+++ b/gnpy/tools/service_sheet.py
@@ -178,12 +178,9 @@ def read_service_sheet(
         eqpt,
         network,
         network_filename=None,
-        bidir=False,
-        filter_region=None):
+        bidir=False):
     """ converts a service sheet into a json structure
     """
-    if filter_region is None:
-        filter_region = []
     if network_filename is None:
         network_filename = input_filename
     service = parse_excel(input_filename)