Command execution failed for server group(s) :

[Cognos8]

In cognos 10 admin, there is admin activity "query service cache".  when clear the the cache it throws the below error
Command execution failed for server group(s) :  " any quick response is appreciated.

[Rahul Ganguli]

Hi,

Were you able to figure out the issue?

Regards,
Rahul

[bigwig]

This message may mean your Query Service has fallen over. Drill into your dispatcher in Administration-System and check Query Service status and choose "Start" if needed.