Table log for a Z table

Hello SAP gurus,

I need to find the changes made to my Z table between two specified dates.

I can find it using FM DBLOG_READ_WITH_STATISTIC.

But if the user updates teh same Z table through a report which uploads the data into Z table using a CSV input file, it doesnt show any log changes but the Z table ahs the entries.

Please help in suggesting a way to find the table log of Z table if it is updated using a report program.

Thanks in advance.