Application Crash - ntdll.dll

Dear NI,

I have a CVI application running on a WIN7 single board computer collecting data and doing some calculation continuously.  It runs well for a day then crashes with the following windows message.

Problem signature:
Problem Event Name: APPCRASH
Application Name: VCON.exe
Application Version: 4.0.0.0
Application Timestamp: 59961611
Fault Module Name: ntdll.dll
Fault Module Version: 6.1.7601.23864
Fault Module Timestamp: 595fa490
Exception Code: c0000005
Exception Offset: 0002e43e
OS Version: 6.1.7601.2.1.0.320.65
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

This same application works fine on my laptop with no crash.  I found a similar thread https://forums.ni.com/t5/LabWindows-CVI/ntdll-issue/m-p/3067859.  But the DEP security setting is essential Windows programs and services only.  Is there any other Windows settings to check?

Thanks,

JZ.