CSKB_ No items are valid on DD.MM.YYYY

Hi all,

In CSKB transaction, We have sub assemblies of Main assembly. But one Sub assembly doesn't show Multiple level BOM.

When we check in Order BOM (CS62/CS63) of Sub assembly it shows No items are valid on DD.MM.YYYY warning message.

Material BOM is maintained for all Sub assemblies.

Waiting for Valuable Suggestion.