Hello. I ask some question of covariates.

I’m struggling with using CohortMethod pacakges in R and when I run **getDbCohortMethodData()** function, foutunately it runs.

But the point is the result of that function show that it has no covariates like below.

Covariates:

Number of covariates: NA

Number of non-zero covariate values: NA

Before I run getDbCohortMethodData(), I set covariates with run **createDefaultCovariateSettings()** and when I check the concept ID of covariates that I will exclude it shows it.

I don’t know what is the problems and how to solve this one. Please help me