=if(not(isnull(pv!request_reactived_date)),

if(pv!request_date<pv!request_onhold_date, calworkdays(todatetime(gmt(pv!request_date)),todatetime(gmt(pv!release_date)))- calworkdays(todatetime(gmt(pv!request_onhold_date)),todatetime(gmt(pv!request_reactived_date))),

if(and(pv!request_date>=pv!request_onhold_date,pv!request_date<pv!request_reactived_date), calworkdays(todatetime(gmt(pv!request_reactived_date)),todatetime(gmt(pv!release_date))), calworkdays(todatetime(gmt(pv!request_date)),todatetime(gmt(pv!release_date))))),


 calworkdays(todatetime(gmt(pv!request_date)),todatetime(gmt(pv!release_date))))