To give any sort of helpful answer I'd need data on exactly why the repository pull task is failing. First take a look at the server task log (Menu | Automation | Server Task Log) and see what error is provided for the failure. Beyond that take a look at the epoapsvr.log (located here by default: <ePO Install directory>\DB\Logs) immediatly after the pull task fails and it should provide a meaningful error.
hi kindly find the ER NO (12007) when i tried to pull donw update this morning.
secondly, some other systems on the network are not reporting to the EPO server. they giving this error message agent failed to communicating to epo server but other are reporting and working correctly. please your help count a lot here .
For the systems that are reporting agent failed verify they have different GUIDs.
You can do this by looking at the registry key : hklm\software\Wow6432Node\Network Associates\ePolicy Orchestrator\Agent:AgentGUID
hklm\software\Network Associates\ePolicy Orchestrator\Agent:AgentGUID
Otherwise check by right clicking on the Tray Icon and go to McAfee Agent Status Monitor > Agent Settings > Agent ID