mayabatch 0xC0000409 error (1073740791)

[creativeplanet]

Hello,

Out of no reason, we started to experience a completely random error on our render farm (various PC's various scenes that were previously rendered without a problem).   It shows as: error-code (0xC0000409) 

It also sometimes show as : 

• libpng error: Read Error // Maya exited with status -1073740791
• fatal flex scanner internal error--end of buffer missed.

It points to C:\WINDOWS\System32\ucrtbase.dll

here is a message from windows event viewer:

Faulting application name: mayabatch.exe, version: 18.7.0.9933, time stamp: 0x5e97bde2
Faulting module name: ucrtbase.dll, version: 10.0.19041.789, time stamp: 0x2bd748bf
Exception code: 0xc0000409
Fault offset: 0x000000000007286e
Faulting process id: 0x36dc
Faulting application start time: 0x01d823e7d510b2fc
Faulting application path: C:\Program Files\Autodesk\Maya2018\bin\mayabatch.exe
Faulting module path: C:\WINDOWS\System32\ucrtbase.dll
Report Id: 428aad7f-1fee-454a-bd77-a09ecd95dfee
Faulting package full name:
Faulting package-relative application ID:

Attached is the report. Any ideas what might be the reason ? 

Thanks in advance

Maciej

[creativeplanet · Accepted solution]

OK, Solution found- an error was caused by the file access problems. 

some details FYI:
I think the problem was a hardware/network issue, in particular Qnap Nas settings (one of these or both):

Asynchronous I/O - enabled in SMB settings,

Lock File (Oplocks) - enabled in shared folder settings.

After disabling both the problem disappeared.

hope it helps somebody one-day :).
Maciej