EPM Grids very slow loading

We are on Profitability Model Builder Version 11.30.0 Build 6163.

Our nightly model calculation is now up to 3 hours, which after this time, it takes another 1.5-2 hours to open up any data grids.

Does anyone know the process the calc is going through, as opposed to the first time opening up grids after a calc is complete?

It seems that our number of possible combinations of data is affecting the grid populations, but I'm not sure.

We currently have the following number of combinations:

LIV 62,486,514

RDS 6,497,084,160

RDV 14,502,420

ADV 645,672,960

I don't know how that compares to other models, but it really seems to be affecting our model as we add data each month.

Thanks.