How to Post Goods Issue an outbound delivery?

I am trying to PGI a delivery which is related to STO. I have tried using BAPI_GOODSMVT_CREATE but it appears it does not support movement type 641?? Does anyone have any advice on how to use this FM or another FM that could be used to PGI a delivery?

Here is the business process:

1. Create STO

2. Create Outbound Delivery with reference to STO

3. Create Transfer Order with reference to Outb Delivery

4. Confirm TO

5. PGI the delivery - This is the step I am currently trying to figure out!

Regards,

Brian