ERROR DispatchThread - Error reading runtime settings: File does not exist - Splunk 6.0 (upgraded)

I upgraded from Splunk Enterprise 5.0.5 to 6.0 and this error is showing in logs. Is it anything to worry about ?

file : splunkd.log 10-04-2013 12:40:29.441 +0100 ERROR DispatchThread - Error reading runtime settings: File does not exist