If the partial restart scheme is used, an update interval of length t reset is determined where the two times t bef and t upd are the start and end times of this interval. The wave function parameters and the PES are then reset to the values at t bef , which have been saved in a previous integration step. If t bef is smaller than or equal to t 0 then the wave function parameters and PES are reset as if we were in a full restart run. After the parameters have been reset, all saved data for times that are larger than t are cleared. This includes the one-mode densities, so the newest densities are from the new t. The TD-ADGA integrals are then recalculated with the "new" one-mode densities without checking for grid convergence.