Straight table dimensions error on filter with timestamp

[#1]

Hi Community,

I have a table box that show the stored data in one .csv with only 1 record.

It works fine but, i have to change it to .qvd to store the same information with a timestamp of every reload (more than 1 record).

And i want to show only the last result based on timestamp(like the first table box).

I'm doing a straight table but in Dimensions i get the error "Error on calculated dimension". The expression i use is "timestamp(max(TimeSnapshot))".

     This is the first table i had:

And this is how it appears with more than one record:

And i don't be able to filter it on straight table.

Thanks in advance,

Ivan.