We are happy to announce the release of Spot 2.10.1 This is a maintenance release fixing a few bug discovered right after the release for Spot 2.10 last week. You can find the new release here: http://www.lrde.epita.fr/dload/spot/spot-2.10.1.tar.gz See https://spot.lrde.epita.fr/ for documentation and installation instructions. Please direct any feedback to &lt;spot(a)lrde.epita.fr&gt;fr>. New in spot 2.10.1 (2021-11-19) Build: - Python 3.5 or later is now required (unless Python bindings are disabled). Python 3.5 reached end-of-life one year ago, so we believe support for older versions of Python will not be missed. Library: - The sbacc() function now defines the "original-states" property, allowing to map an output state back to its input. Bugs fixed: - Ranged repetition operators from LTL/PSL, like [*a..b], [->a..b] or even F[a..b] used to store and handle a and b as 8-bit values without overflow checks. So for instance {a[*260];b} was silently interpreted as {a[*4];b} This version still restricts those bounds to 8 bits, but now diagnose overflow checks while parsing and constructing formulas. Also the so called "trivial simplification rules" will not be applied in case they would lead to an overflow. For instance {a;[*150];[*50];b} is rewritten to {a;[*200];b} but {a;[*150];[*150];b} is untouched. - Fix a compilation error on system with glibc older than 2.18, where <inttypes.h> does not define some C99 macro by default when compiled in C++ mode. (Such old libraries are used when compiling packages for conda-forge, which use CentOS 6 as building environment.) - Fix a link error of tests/ltsmin/modelcheck not finding BDD functions on some systems (observed on CentOS 6 again). - Fix spurious test-suite failures under newer Jupyter installations. IPykernel 6.0 now captures stdout/stderr from subprocesses and displays them in the notebook. The spot.ltsmin code that loads modules compiled with SpinS had to be rewritten to capture and display the output of SpinS, so that our test-cases can be reproduced regardless of the IPykernel version. This fix was easier to do in Python 3.5. - Fix sevaral minor documentation errors.