Don't think this applies but just in case:
Sage 100 Advanced v 4.5 (aka MAS200) running as a service shuts down on server with error similar to:
Faulting application name: pvxwin32.EXE, version: 9.30.6.0, time stamp: 0x
4dd2c46d
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x0b17fd24
Faulting process id: 0x728
Faulting application start time: 0x01ce312f959c75e3
Faulting application path: C:\Sage\MAS 200 Client\Version4\MAS90\HOME\pvxwin32.EXE
Faulting module path: unknown
Report Id: 433a5e3e-9d23-11e2-921e-00155d3c9b0a
Suggested Fix:
Try turning off Data execution prevention for pvxwin32.exe and see if that helps.
To configure DEP settings
Click Start, click Control Panel, and then double-click System.
Click the Advanced tab. Then, under Performance, click Settings.
Click the Data Execution Prevention tab.
Click Turn on DEP for essential Windows programs and services only to select the OptIn policy.
Click Turn on DEP for all programs and services except those I select to select the OptOut policy.
If you selected the OptOut policy, click Add and add the applications that you do not want to use DEP with
http://dsdtips.com/how-do-you-resolve-mas90-or-mas200-force-close-errors-when-you-are-running-mas-on-a-terminal-server-on-a-win-2008-r2-64-bit-server/