code: @Override
  	protected void removeVariablesSub(Variable[] ti) {
  		int[] Ids = new int[ti.length];
  		for (int i = 0; i < ti.length;i ++) 
  		{
  			if (ti[i] instanceof TimePoint) {
  				Ids[i] = ((TimePoint)ti[i]).getID();
  			}
  		}
  		//super.removeVariable(ti);
  		tpDelete(Ids);
  	}
docs: Remove many variables (timepoints).