Slowly opening or non opening .dac files

Recently I added an additional layer to a model  that I was having some oscillations in.  The vertical refinement helped with the oscillations, but my run times increased significanly.  But more troubling is the .dac files are know taking 15 to 20 minutes to open previously they took about 1 minute.  The size of the files has not increased 15 to 20 times.  Does anyone know why this may be occuring?

You can normally control the save settings in the "output control window", e.g., you can specify to save at specific time steps, which would keep your *.dac file a reasonable size. But you probably know that already! I also find it easier to open and explore a dac file in FE Explorer.

Upon more more investigation I realized not only are my .dac files takinga a LONG time to open they are not including the entire run.  Even though the .dac file was being updated every few minutes throughout the run and resulted in a large .dac, only the first 99 iterations were in the .dac file that I opened.  It seems like something is not being written appropriately in the .dac file.  Any ideas?

Some time ago, a bug was detected for dac files with (exactly!) 100 or a multiplier of 100 time steps. This bug has been fixed. Please try to install the latest patch version of FEFLOW.