hello

I'm using OTRS 2.4.7  , I want to know how to export or delete the historical old tickets from OTRS. 

when I want to enter the 'export' item from 'admin'--'import/export' , the error display as below. My OS is solaris 10.

Error: No object backend found!
Comment:
Bug Report:
Traceback:
 
ERROR: OTRS-CGI-10 Perl: 5.8.8 OS: solaris Time: Mon May 23 06:30:41 2011

Message: No object backend found!

Traceback (26636): 
   Module: Kernel::Modules::AdminImportExport::Run (v1.20) Line: 1246
   Module: Kernel::System::Web::InterfaceAgent::Run (v1.43.2.1) Line: 819
   Module: /opt/atts/bin/cgi-bin/index.pl (v1.88) Line: 48

Thanks 

Justin