in Catlog form there are 2 variables application owner and custodian

[srikanthr066535]

in Catlog form there are 2 variables application owner and custodian both are refernce to user table i want to send approvals to those users.

i am using below code in approval activity but not working:

approvers.push(current.variables.application_custodian.toString());

approvers.push(current.variables.application_owner.toString());