level of detail expressions cannot contain table calculations or the attr function in Tableau

Question

i have this tableau workbook

basically this calculated day different between each user_id and each transaction for each user_id with this calculation

DATEDIFF('day',LOOKUP(MIN([Created At]),-1), MIN([Created At]))

that pull filters its so filter the conditions of users (We can ignore this)

and date_rante filters its for calculated day different between date range on parameter

with this calculated

lookup(min(([Created At])),0) >= [START_DATE] and 
lookup(min(([Created At])),0) <= [END_DATE]

so from the frequency i want to find out the Max of different day, with this calculated

MAX({FIXED [User Id]:DATEDIFF('day',LOOKUP(MIN([Created At]),-1), MIN([Created At]))})

but it says

level of detail expressions cannot contain table calculations or the attr function

so i used this solution https://kb.tableau.com/articles/howto/finding-the-dimension-member-with-the-highest-measure-value

and from that solution, i applied with my codes into like this

MAX({FIXED [User Id]:DATEDIFF('day',INT(LOOKUP(MIN([Created At]),-1)), INT(MIN([Created At])))})

but it turns to error datediff being called with string,integer,integer

based on @Anil solution, i tried to create it, and idk why the results was like this

new picture

Answer 1

Presently, as far as my knowledge of tableau is, tableau doesn't allow to calculate LOD calcs or further aggregations on table calcs. To find the transactions where the user took most/max time (in days) in subsequent order- You can do this workaround..

Let's assume your datediff calc field is named as CF1 . create another calc field lets say CF2 with following calculation

rank_unique([CF1])

EDIT:
Change table calcs on this field similar to CF1 . putting a filter on this field will give you the dates with max(time diff) as shown in screenshot.

table calculation options on first (datediff field)

table calculation options on second field (rank_unique)

I have added third field on colors

(Please note no field used in filters just to highlight)