pfSense

Ive come across the following in my logs

Mar 19 00:25:31 v2 php: : The command '/bin/pkill -f 'updaterrd.sh'' returned exit code '1', the output was ''

and I have located that this error is generated by /etc/inc/rrd.inc line 637, the line in question reads

mwexec("/bin/pkill -f '/[u]pdaterrd.sh'");

I have tried removing the [] and it still results in an error, even removing the / dont help, sorry couldnt debug further :0)