To get more details about this error, run Sweet Home 3D from the command line with a command like: and post here the text of [font=courier new]log.txt[/font] when you try to save.

It all depends what you call an "official website"… As Sweet Home 3D installer isn’t available on sweethome3d.com, you’ll have to rely on an other source, and the version distributed under GNU GPL at sourceforge.net is free as stated in the FAQ.

Hope this thread will help…

The free GNU GPL version is still available at https://sourceforge.net/projects/sweeth ... ome3D-7.5/

Try the alternate SweetHome3D-Java3D-1_5_2 script provided with Linux installer.

I removed the posts reported by Keet (and I also remove some posts from time to time by myself).
Mario, please pay more attention to hidden links and links in signatures. It would be also nice to take into account Keet’s posts who gently reports spams.
Good luck!

In demo mode, you can't save the project unless you're able to apply the trick described in this thread.

Try the suggestions in the FAQ Texts in the furniture catalog are not displayed correctly or icons in the toolbar appear very small on my computer. How can I fix that?

This may happen when the program don't have enough memory at disposal. Try to increase the maximum memory Sweet Home 3D may use by following these instructions .
If it doesn't fix your issue, try to remove some furniture from your design removing the big ones first (display the Model size column to ...

It looks the bug #684.
Turning off Nahimic service generally fixes this issue.