# Revision history [back]

### Sage 9.0 - Windows 10 - matplotlib failure

I've just installed Sage 9.0 on Windows 10. It's generally working except for one thing:

When I import matplotlib.pyplot as plt, i get the following error:

Matplotlib is building the font cache using fc-list. This may take a moment.

This never goes away.

 2 retagged FrédéricC 3497 ●3 ●34 ●68

### Sage 9.0 - Windows 10 - matplotlib failure

I've just installed Sage 9.0 on Windows 10. It's generally working except for one thing:

When I import matplotlib.pyplot as plt, i get the following error:

Matplotlib is building the font cache using fc-list. This may take a moment.

This never goes away.