Enterprise Manager found error log

Hi

 

I found this error in EM log.

 

Could not get local config time for device with UID 5: iControl error: 'iControl::char*:SOAPException: 'Error setting TCP_NODELAY: Protocol not available'

 

And I got this email from EM after error happen.

 

"EM em1.abc.com Device LTM01.abc.com has been unreachable for 92 seconds."

 

No any error during that time.

 

Have you ever found this error and how you solve it?

 

Thank you