Over the course of a project, the sheets arrangement can change at certain milestones. For example, after completing preliminary plans and moving into final plans. At the milestones, the order of the sheets can change and sometimes sheets will be removed. We need to preserve the original sheet index while developing a new sheet index for the next milestone.

We thought: Let’s make a new dgnSI for the next milestone and add the sheets all over again. This is problematic because: It will not allow me to add any given sheet to two dgnSI files. This seems like an unreasonable limitation.