====== DELBBC Command ======

DELBBC,<start>,[end],[stride]

Delete backbone curves in the active model. 

  * start - the starting backbone curve to delete
  * end - the last backbone curve to delete (default = start)
  * stride - stride increment for deleting backbone curves (default = 1)  The command will warn the user that the default stride was used if the argument is left blank or the user gives a stride value less than 1.