Webservice Dialog - restart after error

[Srinivasan Ramanan]

Hi Sue,
Error in call back processing will occur in the situation you explained. It 
will happen even if you try to simulate the same condition of opening forms 
twice in two session of SAP from within workitem inbox.

If I understand correctly you are having this issue with custome developed 
workflows.
Your options are :
        1. If BO associated with the workitem is std SAP check if you can 
use 'ENQUEUE' .
        2. If it is custom developed BO itself , you should create an 
'ENQUEUE' object ( lock object in ABAP ), then lock it after it is opened 
for the first time. Hence the same form can not be opened second time. I 
think you also do not the forms to be opened twice or more in successions.

regrads
Srinivasan

>From: "Sue Doughty" <Sue.Doughty at odfl.com>
>Reply-To: "SAP Workflow Users' Group" <sap-wug at mit.edu>
>To: "SAP Workflow Users' Group" <sap-wug at mit.edu>
>Subject: RE: Webservice Dialog - restart after error
>Date: Mon, 12 Feb 2007 11:55:24 -0500
>
>I didn't get any replies on sending this out last week.  Can anyone
>help?
>
>Sue Doughty
>
>
>________________________________
>
>From: sap-wug-bounces at mit.edu [mailto:sap-wug-bounces at mit.edu] On Behalf
>Of Sue Doughty
>Sent: Monday, February 05, 2007 8:38 AM
>To: SAP Workflow Users' Group
>Subject: Webservice Dialog - restart after error
>
>
>We are on 4.7, Basis 6.40.
>
>We have in-house developed workflows that execute Webservice Dialogs --
>they open web pages for the users to enter data and then the user hits
>the submit button, which completes the task and the workflow sends the
>request to the appropriate managers for approval, etc.
>
>Sometimes, the users execute the work items more than once -- which they
>then have more than one web page open at once.  When they complete the
>form that is other than the first form opened and click submit, it
>causes the workflow to go into error status with an "Error in callback
>processing" and "Invalid execution GUID. Work item could not be
>completed".
>
>When we get the email notifications of these errors, all we have to do
>is "Restart after error" and everything continues.
>
>My question:  Is there a way inside the workflow that I can do a
>'restart after error'?  I can see in the Workitem container where the
>Workitemstatus = 'ERROR'.  Is there a workflow step that can be done
>that will let the workflow continue without manually doing the
>"restarting after error" or is there a way that the workflow can tell if
>the work item has already been executed -- that there is already a web
>page open?
>
>Any help would be appreciated.
>
>Sue Doughty
>
>
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