diff --git a/src/specimen/cmpb/workflow.py b/src/specimen/cmpb/workflow.py
index 9325a14..9438647 100644
--- a/src/specimen/cmpb/workflow.py
+++ b/src/specimen/cmpb/workflow.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-__author__ = "Tobias Fehrenbach, Famke Baeuerle and Gwendolyn O. Döbel"
+__author__ = "Tobias Fehrenbach, Famke Baeuerle, Gwendolyn O. Döbel and Carolin Brune"
 
 ################################################################################
 # requirements
@@ -14,6 +14,7 @@
 import pandas as pd
 import matplotlib.pyplot as plt
 from datetime import date
+from pathlib import Path
 
 from ..util.set_up import save_cmpb_user_input
 
@@ -33,14 +34,14 @@ def run(configpath=None):
     
     config = save_cmpb_user_input(configpath)
     today = date.today().strftime("%Y%m%d")
-    log_file = f'{config["out_path"]}rg_{str(today)}.log'
+    log_file = Path(config["out_path"],f'rg_{str(today)}.log')
     
     # check if the output directory is already present, if not create it
     if not os.path.isdir(config['out_path']):
         logging.info('Given out_path is not yet a directory, creating ' + config['out_path'])
         os.makedirs(config['out_path'])
     if config['visualize']:
-        dir = os.path.join(config['out_path'] + 'visualization/')
+        dir = Path(config['out_path'],'visualization')
         if not os.path.isdir(dir): 
             os.makedirs(dir) 
     
@@ -64,13 +65,14 @@ def run(configpath=None):
     if config['multiple']:
         logging.info('Growth simulation for multiple models: ')
         models_cobra = rg.utility.io.load_model(config['multiple_paths'], 'cobra')
-        # .....................................
-        # @TODO: 
-        growth_all = rg.comparison.simulate_all(models_cobra, config['media'], config['growth_basis'], config['anaerobic_growth'])
-        growth_prefix = 'anaerobic_growth_' if config['anaerobic_growth'] else 'growth_'
-        growth_all.to_csv(config['out_path'] + growth_prefix + str(today) + '_' + config['growth_basis'] + '.csv', index=False)
-        logging.info('Multiple model growth simulation results are saved to ' +  growth_prefix + str(today) + '_' + config['growth_basis'] + '.csv')
-        # .....................................
+        growth_all = rg.analysis.growth.growth_analysis(model_cobra,
+                    config['mediapath'],
+                    namespace = config['namespace'],
+                    retrieve='report')
+        growth_all.save(Path(config['out_path']))
+        logging.info('Multiple model growth simulation results are saved to ' +  str(Path(config['out_path'], 'GrowthSimReport')))
+
+        ###########
 
         # visualizations
         # .....................................
diff --git a/src/specimen/data/config/cmpb_config.yaml b/src/specimen/data/config/cmpb_config.yaml
index af211af..cceb572 100644
--- a/src/specimen/data/config/cmpb_config.yaml
+++ b/src/specimen/data/config/cmpb_config.yaml
@@ -16,11 +16,11 @@ Settings for scripts that investigate the model: >
 # Set to TRUE if you want pngs that aid in model investigation, will be saved to a folder called 'visualization'
 visualize: TRUE
 
-# Set the basis medium to simulate growth from
-growth_basis: 'minimal_uptake' # 'default_uptake' or 'minimal_uptake'
+# Set the path to a medium config for growth simulation 
+mediapath: 'media_config.yaml'
 
-# Set to TRUE if you want to simulate anaerobic growth
-anaerobic_growth: FALSE
+# Namespace to use for the model
+namespace: 'BiGG'
 
 # Settings if you want to compare multiple models
 multiple: FALSE
@@ -30,18 +30,6 @@ multiple_paths: # enter as many paths as you need below
   - ''
 single: TRUE # set to False if you only want to work with the multiple models
 
-# media to simulate growth from, just comment the media you do not want with a #
-media: 
-  - 'LB'
-  - 'RPMI'
-  - 'M9'
-  - 'SNM3'
-  - 'CGXII'
-  - 'CasA'
-  - 'Blood'
-  - 'dGMM'
-  - 'MP-AU'
-
 # Determine whether the biomass function should be checked & normalised
 biomass: TRUE