just letting you know that I've just released version 3.1.2. This is a bug fix with minor changes, the most notable of which is that read-only worksheets now support scoped definitions (defined names). This was a minor change with, unfortunately, occasionally major inconvenience, especially for people using Pandas, which defaults to using read-only mode. Sorry about that. These things happen sometimes and are difficult to test against. I've added a test that should hopefully catch similar issues in the future.
As always, please check the change log for details:
Clark Consulting & Research