In BSP, I call the function 'SD_DELIVERY_UPDATE_PICKING' to update a delivery. Unfortunately, when there is an error during processing this function (it is returned in the export table PROT), I found that this delivery is always locked! On the other hand, calling this function in SAP GUI, I haven't found this problem. How can I solve it. I try to use the command 'commit work.', but it doesn't work.
Moreover, when this function raises an error message, in SAP GUI this function terminates its work according to the message type 'E' rule. However, in BSP, when this error message is raised, the page shows 'The page cannot be displayed'. How can I solve these problems.