data post deletion and reuse

hi,

I have a standard edem simulation, which includes particle packing and geometry initialing.

But I have difficult in simulation with different parameters.

I first use "save as" to make copies of the standard case and simulation, but I have to copy all the data in standard case, rather than the only time step I need.

I also try to copy it directly from the "case_data" file, but edem shows errror saying "time data not albe to read".

I want to know how to use the specific time step copy and how to delete specific tiem step after simulation.

Thanks!