BOM exploding problem

Hi All,

When I am trying to process a sales order with one material witch is a BOM material It could not explode the BOM. I am getting the error as Structure explosion for item 000020 is not possible.

I checked the item category group for the material i.e ERLA and other materials also.while creating the BOM selected usage 5,itc L.Please let me know if I am missing some thing.

Thanks,

AKHI.