Troubleshooting

Solutions to common issues and frequently asked questions about P90.

Common Issues

Authentication problems

• See Registration to ensure you have a valid PV Lighthouse account with SunSolve P90 access.

Interactive plots are appearing duplicated in VS Code

• Restart the kernel (Runtime > Restart session)

Note: you may need to restart the kernel to use updated packages.

• This warning can be safely ignored.

“Warning: This notebook was not authored by Google”

• This is a generic Google Colab warning that can be safely ignored.

Data Loading Errors

• Ensure weather data file path is correct
• Verify file format is supported (.pvw or .csv)
• Check for missing meteorological variables

Import Errors

ModuleNotFoundError: No module named 'numpy'

Import errors indicate you haven’t yet installed the mentioned module. This can be fixed by running %pip install numpy, replacing numpy with the relevant module name.

You can also install all the potentially missing packages in one line:

%pip install numpy pandas plotly scipy matplotlib openpyxl --quiet

You may need to install pip, if you do not yet have it installed, see pip installation guide.

Duplicate Interactive Plots in VS Code Jupyter Notebooks

This issue occurs when VS Code’s Jupyter extension gets into a state where interactive widgets display multiple times. To resolve it:

Reset Jupyter Extension

Warning: save your results before attempting this, as you will lose all stored variables.

1. Press Ctrl+Shift+P to open the Command Palette.
2. Type “Python: Clear Cache and Reload Window” and press enter once the option is highlighted.