Standardized mortality rate

[peiting]

Hi, I am running a standardized mortality rate using SAS University Edition Oracle Virtual Box 6.1. 

I came across the error comment when run the analysis (1st print screen)

This is because I do not have number of death for 1 of the strata has no death event as well as total per group (excel sheet):

Is there a way to fix this issue?

[StatDave · Accepted solution]

Yes, that is the reason. You could simply drop that stratum from both the study and reference populations.