I am facing a problem while creating Blanket PO from copying from another Blanket PO. I select the PO and adopt it in ME21N. But the fields vendor, account assignment category and plant are in display mode. I cant change for the new Blanket PO.But for standard POs, if I adopt also, all fields are in editable field.Is there any kind of environment field status related to item category? I have created blanket PO by giving item category 'B' and limits specified.My reqiuirment is to create Blanket PO from adopting from existing blanket PO with editable mode for above specified fields.