Hi bajp2019,
this second crash was also without any error? Just crash?
Is this also happening for other dataset? Is it possible to compute Preview model?
Probably there could be a problem with number of cores. For example you have 24 cores * 2 hyperthreading * 4 gb of ram per thread = 192GB RAM for a good performance in high compute calculation. Otherwise it is swapped on C disc.
Could you test disabling some of your cores or disabling hyperthreading in your BIOS? And turn the reconstruction test again?
One more thing I would try is to manually set windows swap to 150% of your current RAM so you would have 32GB+ 150% on windows swap (keep in mind to use an SSD disk for that when you will all the time have at least 50 GB of storage left)