BAPI CommitWork fails DCOM Connector

Question

I have a VB program using BAPIs with the DCOM Connector. The BAPI object and session object are exported to an MTS
server machine. In the VB program I create a global oSession object and logon to R/3 at the form load event. In one function I instantiate the BAPI Object locally with Set oBO = oSession.CreateInstance("BOprogId"), and run some methods on the object that work fine and Set oBO = nothing at the end of the function.
In a followup function I instantiate the BO again locally with Set oBO = CreateInstance("BOprogid"), then do a change method on instance dependant object after doing oBO.InitKeys. The BAPI return is succesful, so I want to commit the change and issue an oSession.CommitWork. The DCOM connector monitor shows the last function is ABAP4_COMMIT_WORK but it remains in an active state there and the VB program gets a nonzero return: error> -2147023170, automation error The remote procedure call failed. I don't know why this happens. If I use oBO.CommitWork I get an error also: -2147467259 Object created in Session, so I assume if you instantiate an object with oSession.CreateInstance you have to commit changes using the Session object.
If I use Set oBO = CreateObject("BOprogId") and commit with oBO.Commit, it works without error. This is not practical since I need to enqueue the SAP object in the first function with oBO.Enqueue method before the user makes changes in the UI. When the user requests the update I invoke the change function, then oBO.Dequeue, then oSession.CommitWork.
Can you tell me why the commit fails, or what I may be doing wrong? Incedentanlly, the SAP object is sucessfully
changed. The change BAPI does not have a commit work, so my program must request it.
Please don't suggest using the dotNet Connector, this is not an option for this project.
Thank you.

Answer 1

Refer to this link
SAP Business One SDK Version 2005 [original link is broken]
Search here for sap software distribution center link
https://websmp203.sap-ag.de/~form/handler?_APP=00200682500000001943&_EVENT=SEARCH&HIDE=&SEARCH_SPAT=X&SEARCH_BPAT=X&SEARCH_CD=X&SEARCH_P=X&SEARCH_PV=X&SEARCH_C=X&SEARCH_CV=X&SEARCH_TA=&SEARCH_V=&HIDE_EXPERT_SEARCH=X&SEARCH_MAX_RESULT=20
Regds
Manohar