System log

Hello all,
I use the current Asuswrt-Merlin version 380.57 on my RT-AC87 router.
In the system log, I have evry 15 min that message:
Feb 23 23:14:35 rstats[26672]: Problem loading /mnt/sda1/Data_Rec/tomato_rstats_392c4aab61c7.gz. Still trying...
Feb 23 23:29:35 rstats[26672]: Problem loading /mnt/sda1/Data_Rec/tomato_rstats_392c4aab61c7.gz. Still trying...
Feb 23 23:44:36 rstats[26672]: Problem loading /mnt/sda1/Data_Rec/tomato_rstats_392c4aab61c8.gz. Still trying...
.............
How can I...

System log