How to use Max Timestamp for measure expression

[abc_18]

HI,

I am trying to use Max function along with timestamp function for calculation of measures, but getting an error in expression.

My expression is:-

Interval(

sum({<[reto]={'Correctly created'}>}

Timestamp(Timestamp#([edited date time],'YYYYMMDD hh:mm:ss'),'YYYYMMDD hh:mm:ss')

-

Timestamp(Timestamp#([detail end date time],'YYYYMMDD hh:mm:ss'),'YYYYMMDD hh:mm:ss')

)

,'hh')*24

Please suggest.

[sunny_talwar]

Can you check if the error goes away if you use this expression

=Sum({<[reto] = {'Correctly created'}>} (TimeStamp#([edited date time], 'YYYYMMDD hh:mm:ss') - TimeStamp#([detail end date time], 'YYYYMMDD hh:mm:ss'))) * 24