AP Invoices on SAP B1

HI All,

We are using SAP B1 9.1 PL:0.8

We are trying to process AP invoices. I have to process one AP invoice for multiple GRPO.

eg: i have to process AP invoices for GRPO1, GRPO2, GRPO3.  How can i process multiple at the same time.

later i wanted to do the samething using DTW.  Can someone help me out with the DTW also please.