Question on BILDAR01- load pending items in AR

Hello,

We are on PeopleSoft 9.2 and running processes to generate billing invoices from Contracts.

Processes run sequentially are as below-

CA_BI_INTFC, BIIF001, BIIVC000, BI_IVCEXT, SL_BIPTUNIV, BICURCNV, BIPRELD, BILDGL01, FS_BP, BILDAR01.

I can find the invoice in BI_HDR, BI_LINE but not in PENDING_ITEM table. The expectation is that after running BILDAR01, PENDING_ITEM table should get populated but there is no data. I can see the accounting entry in BI_ACCT_ENTRY table which means invoice was processed by BILDGL01. Why was the invoice not picked up by BILDAR01 ? Thanks.