Fixing a BOM in the Order Browser 
If one or more assemblies in the multi-level BOM for a sales order item are used more than once, then the system displays the dialog box Assemblies occur more than once. Decide how you wish to proceed:
if you want to fix the assembly regardless. Consider that the order BOM then replaces all instances of the material BOM in the multi-level BOM.
, to cancel the process if you first want to carry out a material exchange or want to instantiate the assembly. Also see:
Material Exchange in the Order BrowserThe system fixes all BOMs marked in this list. As standard all BOMs in the list are selected. If you do not want to fix a certain BOM, then remove the relevant flag.

Keep the CTRL key pressed down in order to select several BOMs or to remove the flags for several BOMs.

In the column I/C the dependent requirements for individual and collective requirements are displayed. If this indicator only applies for collective requirements, then you have to change it in the order BOM, so that the BOM is taken into consideration in MRP. For more information, see Order BOMs in MRP
If you want to create WBS BOMs instead of order BOMs continue with the procedure in
Fixing Order BOMs or WBS BOMs.
. The system fixes the BOMs. It then writes a log, in which system activities during fixing are documented.
, to update the display. The order BOMs are displayed in the order browser. You can now process them.

The system creates the order BOMs with today’s date.
If you do not enter a date on the initial screen of the order browser, the system sets the default date. In certain cases this default date can be before todays. If you display the multi-level BOM in the order browser on this date, then in certain cases, the order BOM is not yet valid and will not be displayed. If that is the case, then go back and select another date on the initial screen.