The calculation of the results in grid points is important for displaying values on surfaces, among other things. You can find the information about grid points here:
The problem is that in the case of complex structures and many load combinations, calculation in grid points is relatively time-consuming; therefore, it requires a large amount of memory. Even if you perform the calculation in FE nodes as shown in Image 01, it is always necessary to additionally perform the calculation in grid points. Otherwise, the results cannot be displayed in grid points under Values on Surfaces.
For complex structures, we recommend deactivating this option to perform a faster calculation.