Tables unloaded not displayed in M_CS_UNLOADS

Hi,

I observed that there are tables being unloaded on 2014-10-20 from the diagnostic/trace file indexserver_<hostname>.30003.unloads.001.trc

However, when trying to execute SQL as such, it returned zero rows.

select * from "M_CS_UNLOADS" where UNLOAD_TIME between '19.10.2014 00:00:00' and '22.10.2014 12:00:00'

Any idea? Shouldn't it display all the unloaded tables?

Thanks,
Henry