# Troubleshooting
Here are some common errors and how to solve them.
First thing first, please make sure that the `requirements.txt` only contains these packages:
```
# Core Packages
numpy
pandas
matplotlib
seaborn
scipy
# Machine Learning
scikit-learn
# Data Processing & Analysis
sqlalchemy
```
Try creating the environment and downloading the dependency again Create a Virtual Environment
{% tabs %}
{% tab title="Windows" %}
Error: ExecutionError
(Also as known as: Running scripts is disabled / Ausführung von Skripts auf diesem System deaktiviert)
**To solve this issue, follow these steps:**
1. **Open PowerShell as Administrator**:
* Right-click on the Windows Start menu.
* Select **Windows PowerShell (Admin)** or **PowerShell (Admin)**.
2. **Check the current Execution Policy**: Enter this command and press Enter:
```powershell
Get-ExecutionPolicy
```
If it shows `Restricted`, that means script execution is disabled.
1. **Change the Execution Policy temporarily**:\
To allow the script to run, enter this command and press Enter:
```powershell
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
```
* Type **Y** when prompted. (or **J** in German)
* This change is applied only for the current user and allows running locally created scripts.
2. **Activate your virtual environment**:\
Now try to activate it again:
```powershell
.\venv\Scripts\Activate
or
.\venv\Scripts\activate
```
Error: pip: command not found
#### **Cause:**
* `pip` is not installed or not linked to Python's PATH.
#### **Solution:**
1. **Check pip installation:**
```powershell
python -m pip --version
```
2. **If not installed, install it:**
```powershell
python -m ensurepip --upgrade
```
3. **If still not recognized, reinstall pip:**
```powershell
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py
```
4. **If path issues persist, add to PATH manually:**
```powershell
setx PATH "%PATH%;C:\Users\\AppData\Local\Programs\Python\Python39\Scripts"
```
5. **Restart your terminal and verify:**
```powershell
pip --version
```
Error: ModuleNotFoundError After Activation
**Error Message:**
```
ModuleNotFoundError: No module named 'pandas'
```
**Cause:**
* Dependencies are not installed inside the virtual environment.
**Solution:**
* Ensure the environment is activated:
```bash
.\venv\Scripts\Activate
# Or
.\venv\Scripts\activate
```
* Install your dependencies:
```bash
pip install pandas
```
{% endtab %}
{% tab title="MacOS" %}
Error: ExecutionError
**Error Message:**
```bash
permission denied: ./venv/bin/activate
```
**Cause:**
* The `activate` script does not have execution permissions.
**Solution:**
* Navigate to your project directory:
```bash
cd path/to/your/project
```
* Give execute permissions to the `activate` script:
```bash
chmod +x venv/bin/activate
```
* Activate the environment:
```bash
source venv/bin/activate
```
Error: pip: command not found
**Error Message:**
```bash
zsh: command not found: pip
```
**Cause:**
* pip is not linked to Python or not installed.
**Solution:**
* Use `python3` to call pip directly:
```bash
python3 -m pip install --upgrade pip
```
* Alternatively, install it:
```bash
sudo easy_install pip
```
Error: ModuleNotFoundError After Activation
**Error Message:**
```bash
ModuleNotFoundError: No module named 'pandas'
```
**Cause:**
* Dependencies are not installed inside the virtual environment.
**Solution:**
* Ensure the environment is activated:
```bash
source venv/bin/activate
```
* Install your dependencies:
```bash
pip install pandas
```
{% endtab %}
{% endtabs %}
{% hint style="info" %}
Tip: **Resetting VS Code** helps in some cases:
* If you don't see some of the options in the guide, despite having done everything, try **reseting VS Code** by turning it off and on again.
* If you have installed Git but cannot see some option
* If you have created a virtual environment but cannot find it
{% endhint %}
