Whilst generating a reorg script a simulation is run to check space and other possible issues. Given this scenario the simulation aborts and reports an Access Violation.
This can be caused by a missing QSA parameter. Run the following query to check there is a tablespace nominated to hold temporary objects during a reorg... SQL> select value from quest_exec_parameter where name = 'LW_TABLESPACE';
This parameter is required for the correct functioning of Space Manager. It's absence places into question the stability of the installation, therefore the most appropriate course of action is to uninstall and reinstall both QSA and Space Manager.