When there are too many objects defined in policy store, the AdminUI is not able to display all objects and will fail with the error message: "Siteminder administration error. Too many objects in return list (Error 50)" The default value for the number of objects is 100, if the objects are more than 100 then the registry key needs to be modified.
To override the default setting, add/modify the DWORD key named MaxObjects in the sm.registry file (Unix /Linux) or Windows registry: HKEY_LOCAL_MACHINE\SOFTWARE\Netegrity\Siteminder\CurrentVersion\ObjectStore
Set this value according to the need. The value is in HEX.