Multiple users using the same parts in assemblies or sub-assemblies without getting read only error

Is it possible for two users to use 1 or  more of the same models to create an assembly or sub-assembly at the same time without getting the read only error? Neither person would actually have the model file open making changes, it would just be added files into an assembly for a Bill of Material. We use a lot of the same components to on multiple different jobs across the board (ei. backers, fillers, and pins). Myself and another engineer are working against a tight dead line and we keep running into this problem so I was wondering if anyone know a solution to this.

Thanks in advance,

James

SolidworksAssemblies