Deleting entities when selected

[SRSDS]

I have instances where I need to delete entitities that are contained within a selection.

Being removed from the selection I get an eLockChangeInProgress error in ImpliedSelectionChanged. 

ImpliedSelectionChanged is hit because they are deleted and removed from the selection. 

Is this an error I can disregard?

Another error I haven't yet pinpointed is:

Document “Drawing1.dwg” has a command in progress.

Hit enter or cancel or [Retry]

What is this error? I can't think what might be causing it.

[SRSDS · Accepted solution]

Solved. I removed the entities being deleted from the selection before starting the procedure.

ed.SetImpliedSelection(objids)

Almost a stupid post now that I write this solution. I've been trying all sorts of things to avoid having to delete them.