Windows service terminates unexpectedly following install of Symantec Endpoint 12.1.2015
Customers encountered and reported the following problem after SEP 12.1.2015 is installed on CallPilot voice messaging servers.
CallPilot AOS service (nmaos.exe) fails to start and terminates unexpectedly after Symantec Endpoint Protection 12.1.2015.2015 is installed.
As a result, CallPilot voice messaging server is out of service, it is not able to accept calls, fax and text messages.
The windows service creates and uses named mailslots to send\receive maintenance messages from other CallPilot services.
I tried to debug the service and found out that it crashed when an unhandled exception in nmaos.exe (NTDLL.DLL) 0xC0000005: Access Violation took place when the service called ReadFile function and attempted to read from a mailslot. If I comment a call of the ReadFile function, the service does not crash.
Important note: We fully qualified SEP version 12.1.1000.157 and this SEP version does not cause any issues on CallPilot servers: all CP services are starting and running with no crash.
I also read a posted question about a similar problem with mailslots (http://www.symantec.com/connect/forums/createmails...) and uninstalled Application & Device Control feature but this didn't solve my problem, CP AOS service still crashes.
Does SEP 12.1.2015 hook named mailslots ? Any help is appreciated !