HELP! Random errors creating SAP documents via Add-On.

Question

Hi,
We have a very odd situation.  Our add-on has been running for 4 years.  During this time, we've made several enhancements.  In the last couple of weeks, users are getting random errors during the code that posts SAP documents.  The error doesn't occur creating the same documents everytime but the error message is always the same.  I cannot get the add-on to crash in the development environment.  Furthermore, once a crash occurs, the users can immediately try again and the document will then be created successfully so it's baffling.  We thought we'd tracked it down to the fact that when restarting a users Windows session, we were retaining the user profile files that SAP creates to store the SQL Server settings.  We found that the problem went away once we started deleting these files upon logout, but, the problem just got less frequent, it didn't completely go away.  Here is the error information:
Error: The server threw an exception. (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT))
Source: Interop.SAPbobsCOM
Stack Trace:    at SAPbobsCOM.FieldClass.set_Value(Object pVal)
I should say we've also uninstalled and reinstalled the DI API but that didn't help either.  We are running SAP 2007A SP01 P05 with users logging into Windows Server 2003 via Citrix.  Also note, this error is only occuring with documents being created through the add-on, no crashes occur creating documents direclty through SAP front end.
Thanks very much,
David

Answer 1

Hello David.
I have the exatly the same situation at Customer, only in 2007A version.
The Addon has been developed for 6.5 and was running perfect in last 4 years. After upgrade,  the users got the random messages. and the user try it again can sucessfully post the documents. Only at this company.
There is no citrix, and virtual server, onyl W2003 (32bit:) behind a firewall. (MS SQL 2005 SP2)
In my sample, and your error message is the common: YOu got the message when you are using User Defined Field in marketing documents.
I have found a note about change "coding" of update of User Defined Fields, it was not helped.
Note number: 1235603
Major change:
+
This issue results from using the following code:
SAPbobsCOM.Field f = oPOrders.Lines.UserFields.Fields.Item("U_test")
Instead of the above syntax, you should use the following:
SAPbobsCOM.ProductionOrders_Lines f1 = oPOrders.Lines
SAPbobsCOM.Field  f =  f1.UserFields.Fields.Item("U_test")
Using the suggested syntax lets you perform the operation correctly. The issue does not happen with a regular connection.
+
In Small DB-s i was unbale to reproduce this issue, but in that specific customer (>40GB) i always trouble with this.
My experience,
- that i have created some custom indexes over marketing documents, and the error message was not appears in frequently.
- changed 32 SQL Server Memory Allocation to EWA, the error message was not appears in frequently.
I think this is an SQL server issue.
I am intrested in the solution, SAP Support Center was unable to find any solution for this issue.
Regards,
János Nagy