Could you copy the complete error, you should have a more detailed cause.
On Wed, Nov 12, 2014 at 11:39 AM, Stefan Bernsdorf
<gruener.heinrich(a)web.de> wrote:
 Hi,
 I created a Macro in xwiki.
 In this macro a server process is started that tries to read attachments.
 For this, I created a XWikiCOntext to access the Wiki.
 This is the code:
             XWikiStubContextProvider
 prov=Utils.getComponent(XWikiStubContextProvider.class);
             prov.initialize(template);
             XWikiContext con=prov.createStubContext();
             con.setUser("XWiki.TestProcess", true);
             con.setVirtual(true);
 Unfortunately it is not possible to access the attachment content using this
 context.
 The following error is thrown:
 com.xpn.xwiki.XWikiException: Error number 3231 in 3: Exception while
 loading attachment myseedfile.dgn of document
 microtest_oto.Templates_Test-Stefan
         at
com.xpn.xwiki.store.XWikiHibernateAttachmentStore.loadAttachmentContent(XWikiHibernateAttachmentStore.java:233)
         at
 com.xpn.xwiki.doc.XWikiDocument.loadAttachmentContent(XWikiDocument.java:4600)
         at
 com.xpn.xwiki.doc.XWikiAttachment.getContentInputStream(XWikiAttachment.java:576)
         at
 org.centauron.xwiki.help.XWikiAttachmentCopy.doCommand(XWikiAttachmentCopy.java:79)
         ....
 Any help would be appreciated.
 Regards, Stefan.
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Thomas Mortagne