Running XWiki on JOnAS : tempdir not set

Hi All, I've installed XWiki on JOnAS 4.8.4 and I have some problems. I start JOnAS using as a unix service with standard user priviledge. I have a problem with the tempdir as when I try to upload a file in XWIki I have the following error displayed : "tempdirnotset" So I've added the following line in xwiki.cfg but it doesn't solve my problem : xwiki.upload.tempdir=${java.io.tmpdir}/xwiki In fact, the variable "java.io.tmpdir" is set by JOnAS and is set to "/tmp". So I wonder how can I reuse a java variable to do that ? Regards -- Xavier MOGHRABI - OW2 Consortium Jabber: moghrabi(a)objectweb.org Tel: +33 4 76 61 52 35