Automatically Unpost Job Requisition after the positions are filled using fast formula

Summary:

Need to unpost Job Requisition after positions are filled. Created a fast formula and trying to get count of requisition_id but cannot able to use count condition in Value set. Please help

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DEFAULT FOR IRC_REQ_REQUISITION_NUMBER IS 'NA'

CONDITION_RESULT = 'N'
REQ_COUNT=0

COUNT = COUNT_JOBAPPS_ACTIVE_IN_PHASE_STATE(IRC_REQ_REQUISITION_NUMBER, 'Offer', 'Accepted', 'US')
REQ_ID = GET_CONTEXT(IRC_JOB_REQUISITION_ID,1)

IF (REQ_ID > 1) THEN