Argument "\x{63}" isn't numeric

Hello!

This is a very fine software, thank you very much for it.

Unfortunately, we have Stor2RRD error logs for some (!) of our V3700 storages filling up with errors such as this:
"Argument "\x{63}" isn't numeric in numeric ge (>=) at /var/www/stor2rrd/bin/SVC.pm line 1408."

Data display is OK but routine log checks always bring up this issue again. Only some of our V3700 storages are affected for some reason.

Please advise how to remove these errors.

Best regards,
Carsten