cannot insert line in a booked order (OM_API)

Hello all,

on R12.2.4 env I'm facing a problem when trying to insert a line via OM_API.

The problem occurs only when the order is booked. If entered no problem arise.

Below the test script I'm using to add lines.

The script returns

X_Return_Status => U

p_data => 

Any suggestion?

Many thaks.

regards,

Davide

DECLARE
   i_user_id         NUMBER;
   v_header_rec      OE_ORDER_HEADERS_ALL%ROWTYPE;
   v_item_rec        MTL_SYSTEM_ITEMS%ROWTYPE;
   L_Line_Rec        OE_ORDER_PUB.LINE_TBL_TYPE;
   L_Line_out_Rec    OE_ORDER_PUB.LINE_TBL_TYPE;
   OUT_Return_Status VARCHAR2(10);                                
   OUT_Msg_Count     NUMBER;