Change to catch exceptions generated when exporting

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@5992 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6026 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6027 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6028 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6029 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6030 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6031 9e4fa352-aafb-0310-9071-df624684024b
pepare for release

git-svn-id: svn://svn.openvpms.org/openvpms/vpms/trunk@6032 9e4fa352-aafb-0310-9071-df624684024b