# GROMACS 2019.6 release notes¶

This version was released on February 28th, 2020. These release notes document the changes that have taken place in GROMACS since the previous 2019.5 version, to fix known issues. It also incorporates all fixes made in version 2018.8 and earlier, which you can find described in the Release notes.

## Fixes where mdrun could behave incorrectly¶

### Actually fix PME forces with FE without perturbed q/LJ¶

PME would incorrectly ignore the mesh forces on perturbed atoms when no charges or LJ atom types were actually perturbed. Note that this is a rather uncommon scenario.

### Avoid overzealous program abort with orientation restraints¶

It could happen that mdrun would abort on checking orientation restraints in multiple molecules even though no restraints where applied to them.

Issue 3375

### Calculate Coulomb and LJ reciprocal terms in rerun¶

Reruns would not calculate Coulomb and LJ reciprocal terms, leading to wrong potential energies. This bug only showed up if GROMACS was compiled without GPU support.

Issue 3400

## Fixes for gmx tools¶

Added check for inconsistent input of distance restraint labels in gmx disre.

## Fixes that affect portability¶

### Fix compiler errors with Intel compiler¶

Fix compiler error with Intel compiler 2019 update 5 and 2020 initial release. Compilation was failing with mcpcom: core dumped for the file pullutil.cpp.