Missing rrd file


I am encountering this error message when trying to check the network traffic of one router using ‘nm_check_interface’ command,

CRITICAL: SNMP Poll Failed. Host: XXX_RT1 Address: XXX.XX.X.X Community: Interface: 10 Speed: 100000000 RRD_ERROR: opening ‘/usr/local/nagmin/rrd/db/XXX_RT1_10.rrd’: No such file or directory

Does anyone know how to add a new rrd file?

Thank you.