quartus 10 wont generate sof file

Do you get the project to compile completely with no errors but simply don't have the SOF file? Are you sure you are running the web edition version? It may getting confused about the licenses... it might be confused and think you would rather have the 30 day license of the full feature active versus the web edition.

If you have access to another PC I would try installing the web edition on a clean PC. If that works then you know you have a licensing issue. if that does not work then you have another issue.

If you want a second opinion, you can archive your design and post it and see if someone else can generate a sof.

David