To update flexible representation of parts in BOM Transformer, right-click the parts and select Update > Flexible Representation. You can use this action only in the Occurrence mode.

Using this action, you can update only those changes that are related to position.

When you try to update the flexible representation of a part, the part that contains the flexible feature in that structure is checked out.

The Undo Checkout action will reverse the updates, but the Visualization tab will not display the earlier version that was checked in. You must refresh the structure to view the updated flexible representation.