Error message: domain needs 'min' and 'max' fields

Hi I have run the following search ( Endpoint - Malware Daily Count - Context Gen) verified from a couple of different sources, and get the above mentioned error message....any advice? | tstats `summariesonly` dc(Malware_Attacks.signature) as infection_count from datamodel=Malware.Malware_Attacks where earliest=-31d@d latest=-1d@d Malware_Attacks.action=allowed by Malware_Attacks.dest,_time span=1d | stats sum(infection_count) as total_infection_count by _time | stats count,median(total_infection_count) as median by _time | eval min=0 | eval max=median*2 | xsCreateDDContext name=count_1d container=malware type=domain terms="minimal,small,medium,large,extreme" scope=app app=SA-NetworkProtection | stats count