Help Unable to load an assembly into an assembly

Help;

I'm trying to load an assembly into  a very large assembly (85,609 KB) I keep getting a fault that states "componet could not be added to the assembly at his location as it would go beyond modeler's resolution". 

I also having a problem with whn I open a part it does not show all the parts in an assembly.

Thank you in advance fro your suggstions and help.

Thomas

SolidworksAssemblies