Hi,
i met a very annoying problem while i was creating the BOM versions.
1. in "Inventory and warehouse management" module->BOM, i create the BOM(PC_BOM) and BOM items.
2. in "Production Information Management" module-> "Released Products" i create a item "1000" which will be used as the BOM version.
3. in "inventory and warehouse management" module-> BOM, add the Item(1000) as the BOM(PC_BOM) version, approve and active both the BOM and versions.
the tricky is when i go the "released products" and locate the item 1000. in the Action Panel "Engineer" -> "BOM" group as below picture.

if i click the "Lines" button, the items in the BOM will be listed, but if i click the "Designer" button, i will get an error message like this "BOM for item 1000 has no been set up".
i definitely add the item 1000 in the BOM versions,
from my point of view, "Designer" and "Lines" just two views for the same thing, why i can get two different result.
i'm using the Dynamics AX 2012 R2 at the moment, it's a new fresh system.
Thanks for your help.
William