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https://issues.apache.org/jira/browse/TUSCANY-1147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12476960
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Caroline Maynard commented on TUSCANY-1147:
-------------------------------------------

My bad. It wasn't intuitive to me :-)

By drop, I mean, cause the reference count to decrement to zero. In the case of 
the PHP impl, by setting the referring pointer to NULL. 



> AccessViolation in DataObjectImpl::clearReferences()
> ----------------------------------------------------
>
>                 Key: TUSCANY-1147
>                 URL: https://issues.apache.org/jira/browse/TUSCANY-1147
>             Project: Tuscany
>          Issue Type: Bug
>          Components: C++ SDO
>    Affects Versions: Cpp-current
>         Environment: Win32, PHP 5.2.1
>            Reporter: Caroline Maynard
>            Priority: Critical
>         Attachments: Tuscany-1147.patch
>
>
> Problem observed when SDO A refers to SDO B.  The reference to SDO A is 
> dropped. Then the reference to SDO B is dropped. An AccessViolation occurs in 
> the SDODataObject destructor, in DataObjectImpl::clearReferences().
> I believe this is because the reference was not properly cleared at the time 
> of A's destruction. 

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