- Version bump to 4.1.1
* Restore checkpointing mechanism for the steepest descent and NPT
integrators, LB and NPT thermostats (#3245)
* Increase the minimum MPI version to 3.0; OpenMPI versions 1.6.5 and
lower are no longer supported (#3236)
* Fix `Integrator.set_isotropic_npt()`: remove the silent conversion of
the incorrect input parameter `direction=[0,0,0]` to `[1,1,1]` in the
core; the function now throws an exception for fixed-volume boxes;
this change is unlikely to break pypresso scripts since not providing
a value to `direction` or providing `[1,1,1]` were the two standard
ways to set up a box with all directions allowed to rescale (#3253)
* Fix `Integrator.set_vv()`: this function failed to set the velocity
Verlet integrator if the NPT integrator was active; this is now
resolved (#3274)
* Fix the random segmentation fault triggered by the removal of a
particle with a bond or a virtual site relationship to another
particle (#3288)
* Fix `system.part.writevtk()`: the function now writes down all
particles when using `types="all"` (#3290)
* Disable the deprecated and broken ENGINE shear torque calculation
feature; the feature will be completely removed from the core in
the upcoming 4.2 release (#3277)
* Fix unit conversion for the LB fluid viscosity (#3287)