how can we enable rebuild automatically in an assembly

Hi

I have an assembly file which is derived by an excel for automation. If the dimension of a part inside the assembly is updated the assembly file is not showing the updated dimension. when I open the updated part and rebuild that part then my assembly is updating.

So is there any option such that when my excel file is updated all my parts, sub-assemblies and assemblies will update automatically ?

SolidworksAssemblies