Hi Dharmakasi,
I am using CRM_PS_ACTIVITY_CREATE to create the activity. It has CRM_ORDER_SAVE called inside it.
I am also doing BAPI_TRANSACTION_COMMIT after this step.
And I am using FM 'CRM_ORDER_MAINTAIN_MULTI_OW' to update the status.
The St22 dump is in attachment
Regards,
Prasad