diff --git a/README.md b/README.md
index 6a32ab4..a29e576 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,8 @@ A application for Windows 10 will be available soon.
 
 ### Python installation
 1. Install Python (anaconda) from https://www.anaconda.com/products/individual
-2. Load the following python libraries
+2. Download the folder dexpi2graph_python.
+3. Load the following python libraries
 	- [NetworkX](https://networkx.org/) (vers. 2.4) [2]
 	- [Matplotlib](https://matplotlib.org/) (vers. 3.2.2) [3]
 	- [Pandas](https://pandas.pydata.org/) (vers. 1.0.5) [4]
@@ -42,8 +43,12 @@ A application for Windows 10 will be available soon.
 	- [PySimpleGUI](https://pysimplegui.readthedocs.io/en/latest/) (vers. 4.56.0) [7]
 	- [lxml](https://lxml.de/) (vers. 4.5.2) [8]
     - [openpyxl]() (vers. 3.0.9) [9]
-3. Download the folder dexpi2graph_python.
-4. Running the script *dexpi2graphML.py* starts the converter.
+
+  or create a new conda environment via
+  ```
+  conda env create --name envname --file=environment.yml
+  ```
+4. Running the script *dexpi2graphML-ad@TUDO.py* from main directory and starts the converter.
 
 ## How to Use:
 The *DEXPI2graphML  converter* consists a graphical user interface (GUI) shown in Figure 2.
diff --git a/dexpi2graph_python/dexpi2graphML-ad@TUDO.py b/dexpi2graph_python/dexpi2graphML-ad@TUDO.py
index 82f25b0..e37abbe 100644
--- a/dexpi2graph_python/dexpi2graphML-ad@TUDO.py
+++ b/dexpi2graph_python/dexpi2graphML-ad@TUDO.py
@@ -93,7 +93,7 @@
             window.FindElement('_output_').Update('')
             file = values['selected_plot'][0][:-4]
             error_file = './Output/errorLog/'+file+'_ErrorLog.xlsx'
-            error_df = pd.read_excel(error_file)
+            error_df = pd.read_excel(error_file, engine='openpyxl')
             for i in range(0, len(error_df)):
                 print(error_df['Warning'][i])
                 print(error_df['Node(s)'][i])
diff --git a/environment.yml b/environment.yml
new file mode 100644
index 0000000..5470947
--- /dev/null
+++ b/environment.yml
@@ -0,0 +1,13 @@
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.7
+  - networkx=2.4
+  - matplotlib=3.2.2
+  - pandas=1.0.5
+  - nltk=3.5
+  - pillow=7.2.0
+  - pysimplegui=4.56.0
+  - lxml=4.5.2
+  - openpyxl=3.0.9