Dear all, I've recently updated my local Nektar++ version to the latest one in the repository. In this new version, it looks like there are some changes in checkpoint filter. In particular, once in a while the code writes out chk files with a "bak0" extension. What would this extension supposed to mean? I did some research but couldn't find. I also noticed that the chk file for the same time instance is slightly larger compared to its "bak0" counterpart and to the rest of the fields, for instance: 62G config_22.chk 62G config_23.chk 62G config_24.bak0.chk 64G config_24.chk 62G config_25.chk 62G config_26.chk 62G config_27.chk 62G config_28.chk 62G config_29.chk 62G config_30.chk 62G config_31.chk 62G config_32.chk 62G config_33.chk 62G config_34.chk 62G config_35.chk 62G config_36.chk 62G config_37.chk 62G config_38.bak0.chk 64G config_38.chk It is now a little confusing, which one to keep, bak0 version or the other version, i.e. should I delete for example config_38.bak0.chk or config_38.chk? I'd appreciate any feedback on this. Best, Asim