LogDevice Functioning in Citect 2018 R2 redundant Architechure

Hi,

I have some special operational logs to records in a seperate file, for which i create a seperate alarm category and logdevices OperLog and specify seperate folder location other than DATA

folder to store the file

.

When i put project in runtime on primary server, Opelog.txt file is correctly generating, in midnight as per set time, old file were renamed as operlog.001, operlog.002 and etc correctly, 

however on standby server this is not functioning. All the time in destination folder specify only a  Opelog.txt file of current date is showing and its off 0 KB, no logs recorded at all. Also operlog.001, operlog.002 no such files are created. 

Kindly help to understand the functioning of logdevices in redundant configuration and posible reasons which may causes the issue.

Warm regards

Hemant