Server crashing with fault at UnityPlayer.dll

Every day my server is crashing 1-5 times with this error Os - Windows server 2016 core i7 7700k Mem - 32ram can you help me with this problem THX!

Faulting application name: RustDedicated.exe, version: 2018.3.3.15278, time stamp: 0x5c48c6a0 Faulting module name: UnityPlayer.dll, version: 2018.3.3.15278, time stamp: 0x5c48c6e2 Exception code: 0xc0000005 Fault offset: 0x000000000087fe2a Faulting process id: 0xd3c Faulting application start time: 0x01d5154627cfa664

Hey! Try validating your files using steamcmd
In response to misticos ():
Hey! Try validating your files using steamcmd
file no problems
I just got this crash today with my freshly installed server
The same on mine. The second time in a week. Hopefully an update will help.
It looks like the unityplayer.dll file missing is the issue for your problem. Download the unityplayer.dll file and then put it into the desired directory. This should fix your problem. If not, then you have to reset the PC. For your convenience, here's the file: Link removed

Hello, on Monday before the release of the Halloween update, server crashes started.

The server runs for an average of 20 minutes, after which the crash occurs.

Gamelog

Crash!!!
SymInit: Symbol-SearchPath: '.;C:\Servers\Server_3\rustds;C:\Servers\Server_3\rustds;C:\Windows;C:\Windows\system32;SRV*C:\websymbols*http://msdl.microsoft.com/download/symbols;', symOptions: 534, UserName: 'root'
OS-Version: 10.0.0
C:\Servers\Server_3\rustds\RustDedicated.exe:RustDedicated.exe (00007FF75E700000), size: 667648 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 2019.4.7.37553
C:\Windows\SYSTEM32\ntdll.dll:ntdll.dll (00007FFF07580000), size: 2019328 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\KERNEL32.DLL:KERNEL32.DLL (00007FFF04850000), size: 733184 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.475
C:\Windows\System32\KERNELBASE.dll:KERNELBASE.dll (00007FFF04400000), size: 2707456 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1518
C:\Servers\Server_3\rustds\UnityPlayer.dll:UnityPlayer.dll (00007FFECD110000), size: 26820608 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 2019.4.7.37553
C:\Windows\System32\USER32.dll:USER32.dll (00007FFF05740000), size: 1667072 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1432
C:\Windows\System32\win32u.dll:win32u.dll (00007FFF03690000), size: 131072 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\GDI32.dll:GDI32.dll (00007FFF07420000), size: 167936 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.592
C:\Windows\System32\gdi32full.dll:gdi32full.dll (00007FFF037B0000), size: 1687552 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1518
C:\Windows\System32\msvcp_win.dll:msvcp_win.dll (00007FFF03C00000), size: 655360 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.348
C:\Windows\System32\ucrtbase.dll:ucrtbase.dll (00007FFF046A0000), size: 1024000 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\ole32.dll:ole32.dll (00007FFF04910000), size: 1400832 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1457
C:\Windows\System32\combase.dll:combase.dll (00007FFF04A70000), size: 3330048 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1518
C:\Windows\System32\RPCRT4.dll:RPCRT4.dll (00007FFF072C0000), size: 1187840 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\bcryptPrimitives.dll:bcryptPrimitives.dll (00007FFF03B80000), size: 516096 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1217
C:\Windows\SYSTEM32\VERSION.dll:VERSION.dll (00007FFEFDAE0000), size: 40960 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\msvcrt.dll:msvcrt.dll (00007FFF04FD0000), size: 647168 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 7.0.17763.475
C:\Windows\System32\advapi32.dll:advapi32.dll (00007FFF047A0000), size: 667648 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1131
C:\Windows\System32\sechost.dll:sechost.dll (00007FFF074B0000), size: 647168 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1339
C:\Windows\System32\SHLWAPI.dll:SHLWAPI.dll (00007FFF05070000), size: 335872 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\SETUPAPI.dll:SETUPAPI.dll (00007FFF058E0000), size: 4677632 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.404
C:\Windows\System32\cfgmgr32.dll:cfgmgr32.dll (00007FFF036B0000), size: 303104 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\bcrypt.dll:bcrypt.dll (00007FFF03B50000), size: 155648 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\SHELL32.dll:SHELL32.dll (00007FFF05D60000), size: 21991424 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\shcore.dll:shcore.dll (00007FFF054F0000), size: 688128 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\windows.storage.dll:windows.storage.dll (00007FFF03CA0000), size: 7675904 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1457
C:\Windows\System32\profapi.dll:profapi.dll (00007FFF03600000), size: 147456 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1075
C:\Windows\System32\powrprof.dll:powrprof.dll (00007FFF03580000), size: 380928 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\kernel.appcore.dll:kernel.appcore.dll (00007FFF035E0000), size: 69632 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\cryptsp.dll:cryptsp.dll (00007FFF03B30000), size: 94208 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\OLEAUT32.dll:OLEAUT32.dll (00007FFF05290000), size: 802816 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\IMM32.dll:IMM32.dll (00007FFF073F0000), size: 188416 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.719
C:\Windows\SYSTEM32\OPENGL32.dll:OPENGL32.dll (00007FFEED450000), size: 1208320 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\CRYPT32.dll:CRYPT32.dll (00007FFF03950000), size: 1949696 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.973
C:\Windows\System32\MSASN1.dll:MSASN1.dll (00007FFF03560000), size: 73728 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\WINMM.dll:WINMM.dll (00007FFEF92F0000), size: 147456 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\WS2_32.dll:WS2_32.dll (00007FFF055A0000), size: 446464 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.771
C:\Windows\SYSTEM32\WINHTTP.dll:WINHTTP.dll (00007FFEFFAA0000), size: 999424 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\SYSTEM32\HID.DLL:HID.DLL (00007FFF021E0000), size: 57344 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\GLU32.dll:GLU32.dll (00007FFEF1680000), size: 180224 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\winmmbase.dll:winmmbase.dll (00007FFEF92C0000), size: 184320 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\system32\uxtheme.dll:uxtheme.dll (00007FFF01B20000), size: 638976 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1075
C:\Servers\Server_3\rustds\MonoBleedingEdge\EmbedRuntime\mono-2.0-bdwgc.dll:mono-2.0-bdwgc.dll (00007FFED7480000), size: 7782400 (result: 0), SymType: '-deferred-', PDB: ''
C:\Windows\System32\PSAPI.DLL:PSAPI.DLL (00007FFF05180000), size: 32768 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\system32\mswsock.dll:mswsock.dll (00007FFF02D70000), size: 421888 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1192
C:\Windows\System32\MSCTF.dll:MSCTF.dll (00007FFF05380000), size: 1486848 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1518
C:\Windows\system32\dwmapi.dll:dwmapi.dll (00007FFF01E10000), size: 188416 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1075
C:\Windows\System32\clbcatq.dll:clbcatq.dll (00007FFF050D0000), size: 663552 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 2001.12.10941.16384
C:\Windows\System32\MMDevApi.dll:MMDevApi.dll (00007FFEEDE00000), size: 458752 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1075
C:\Windows\System32\PROPSYS.dll:PROPSYS.dll (00007FFEFF840000), size: 1740800 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 7.0.17763.1075
C:\Windows\System32\DEVOBJ.dll:DEVOBJ.dll (00007FFF03310000), size: 167936 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.771
C:\Windows\system32\rsaenh.dll:rsaenh.dll (00007FFF028F0000), size: 208896 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\CRYPTBASE.dll:CRYPTBASE.dll (00007FFF02F40000), size: 49152 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Servers\Server_3\rustds\RustDedicated_Data\Plugins\x86_64\RustNative.dll:RustNative.dll (00007FFEE0980000), size: 835584 (result: 0), SymType: '-deferred-', PDB: ''
C:\Windows\system32\napinsp.dll:napinsp.dll (00007FFEF1CF0000), size: 90112 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\DNSAPI.dll:DNSAPI.dll (00007FFF02AD0000), size: 815104 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1457
C:\Windows\System32\NSI.dll:NSI.dll (00007FFF05190000), size: 32768 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.831
C:\Windows\SYSTEM32\IPHLPAPI.DLL:IPHLPAPI.DLL (00007FFF02A90000), size: 249856 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.615
C:\Windows\System32\winrnr.dll:winrnr.dll (00007FFEF3F20000), size: 57344 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\system32\NLAapi.dll:NLAapi.dll (00007FFEFF1D0000), size: 110592 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.134
C:\Windows\system32\wshbth.dll:wshbth.dll (00007FFEF1CD0000), size: 86016 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\rasadhlp.dll:rasadhlp.dll (00007FFEFDB60000), size: 40960 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\fwpuclnt.dll:fwpuclnt.dll (00007FFEFE650000), size: 495616 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\SYSTEM32\gpapi.dll:gpapi.dll (00007FFF021F0000), size: 139264 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1518
C:\Windows\SYSTEM32\dhcpcsvc6.DLL:dhcpcsvc6.DLL (00007FFEFE610000), size: 90112 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1457
C:\Windows\SYSTEM32\dhcpcsvc.DLL:dhcpcsvc.DLL (00007FFEFEAC0000), size: 114688 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1457
C:\Servers\Server_3\rustds\RustDedicated_Data\Plugins\x86_64\Renderer.dll:Renderer.dll (00007FFEE0770000), size: 356352 (result: 0), SymType: '-deferred-', PDB: ''
C:\Servers\Server_3\rustds\RustDedicated_Data\Plugins\x86_64\sqlite3.dll:sqlite3.dll (0000000180000000), size: 1708032 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 3.12.2.0
C:\Servers\Server_3\rustds\steam_api64.dll:steam_api64.dll (00007FFEE0930000), size: 278528 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 6.6.99.59
C:\Servers\Server_3\rustds\RustDedicated_Data\Plugins\x86_64\steam_api64.dll:steam_api64.dll (00007FFEE0640000), size: 278528 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 6.6.99.59
C:\Servers\Server_3\rustds\steamclient64.dll:steamclient64.dll (00007FFEC7FA0000), size: 20074496 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 6.7.87.15
C:\Windows\System32\imagehlp.dll:imagehlp.dll (00007FFF05360000), size: 118784 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Servers\Server_3\rustds\tier0_s64.dll:tier0_s64.dll (00007FFEC94E0000), size: 1523712 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 6.7.87.15
C:\Servers\Server_3\rustds\vstdlib_s64.dll:vstdlib_s64.dll (00007FFED9550000), size: 507904 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 6.7.87.15
C:\Windows\SYSTEM32\Secur32.dll:Secur32.dll (00007FFEFF5F0000), size: 49152 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\SSPICLI.DLL:SSPICLI.DLL (00007FFF03490000), size: 192512 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1490
C:\Windows\System32\WINTRUST.dll:WINTRUST.dll (00007FFF03630000), size: 364544 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1518
C:\Windows\system32\wbem\wbemprox.dll:wbemprox.dll (00007FFEFA930000), size: 69632 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\wbemcomn.dll:wbemcomn.dll (00007FFEFC120000), size: 544768 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\system32\wbem\wbemsvc.dll:wbemsvc.dll (00007FFEFAAC0000), size: 81920 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\system32\wbem\fastprox.dll:fastprox.dll (00007FFEF9CA0000), size: 987136 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Servers\Server_3\rustds\RustDedicated_Data\Plugins\x86_64\RakNet.dll:RakNet.dll (00007FFEE05E0000), size: 360448 (result: 0), SymType: '-deferred-', PDB: ''
C:\Servers\Server_3\rustds\RustDedicated_Data\Plugins\x86_64\eac_server.dll:eac_server.dll (00007FFEC7C10000), size: 1449984 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 2.0.0.0
C:\Windows\system32\schannel.DLL:schannel.DLL (00007FFF02820000), size: 540672 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1457
C:\Windows\SYSTEM32\mskeyprotect.dll:mskeyprotect.dll (00007FFEFDC20000), size: 86016 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\ncrypt.dll:ncrypt.dll (00007FFF03040000), size: 155648 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\NTASN1.dll:NTASN1.dll (00007FFF03000000), size: 245760 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\system32\ncryptsslp.dll:ncryptsslp.dll (00007FFEFE240000), size: 147456 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\WINNSI.DLL:WINNSI.DLL (00007FFEFEEF0000), size: 45056 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\System32\cryptnet.dll:cryptnet.dll (00007FFEFD7A0000), size: 192512 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1
C:\Windows\SYSTEM32\dbghelp.dll:dbghelp.dll (00007FFEFEC70000), size: 2019328 (result: 0), SymType: '-deferred-', PDB: '', fileVersion: 10.0.17763.1432

========== OUTPUTTING STACK TRACE ==================

0x00007FFECE1B53CC (UnityPlayer) UnityMain
0x00007FFECE1AE23D (UnityPlayer) UnityMain
0x00007FFECE1AD8D2 (UnityPlayer) UnityMain
0x00007FFECE1B2837 (UnityPlayer) UnityMain
0x00007FFECE1B4E20 (UnityPlayer) UnityMain
0x00007FFECE1A6BEA (UnityPlayer) UnityMain
0x00007FFECE1A697A (UnityPlayer) UnityMain
0x00007FFECE1A4542 (UnityPlayer) UnityMain
0x00007FFECD944B2F (UnityPlayer) UnityMain
0x00007FFECD84E22C (UnityPlayer) UnityMain
0x00007FFECD84E43B (UnityPlayer) UnityMain
0x00007FFECD96A3E6 (UnityPlayer) UnityMain
0x00007FFECD946306 (UnityPlayer) UnityMain
0x00007FFECD893487 (UnityPlayer) UnityMain
0x00007FFECD893523 (UnityPlayer) UnityMain
0x00007FFECD895923 (UnityPlayer) UnityMain
  ERROR: SymGetSymFromAddr64, GetLastError: 'Попытка обращения к неверному адресу.' (Address: 00007FFECD64D88E)
0x00007FFECD64D88E (UnityPlayer) (function-name not available)
  ERROR: SymGetSymFromAddr64, GetLastError: 'Попытка обращения к неверному адресу.' (Address: 00007FFECD64C5EA)
0x00007FFECD64C5EA (UnityPlayer) (function-name not available)
  ERROR: SymGetSymFromAddr64, GetLastError: 'Попытка обращения к неверному адресу.' (Address: 00007FFECD650331)
0x00007FFECD650331 (UnityPlayer) (function-name not available)
0x00007FFECD65404B (UnityPlayer) UnityMain
  ERROR: SymGetSymFromAddr64, GetLastError: 'Попытка обращения к неверному адресу.' (Address: 00007FF75E7011F2)
0x00007FF75E7011F2 (RustDedicated) (function-name not available)
0x00007FFF04867974 (KERNEL32) BaseThreadInitThunk
0x00007FFF075EA271 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

A crash has been intercepted by the crash handler. For call stack and other details, see the latest crash report generated in:
 * C:/Users/836D~1/AppData/Local/Temp/2/Facepunch Studios LTD/Rust/Crashes

Crash handler log. Error.txt
The log file is very large, so I uploaded it to dropbox

https://www.dropbox.com/s/8op6mlalj4tbobu/error.log?dl=1

dhirubhai
It looks like the unityplayer.dll file missing is the issue for your problem. Download the unityplayer.dll file and then put it into the desired directory. This should fix your problem. If not, then you have to reset the PC. For your convenience, here's the file:

I would not recommend downloading any random DLL like that. The crash also indicates that it isn't missing, just at fault for the crash.

@Wulf It's cool that you have answered the question that was left here about a year ago, but still - do you have any idea on what could cause that?
Thing is - I have 2 servers running on the same machine.
One of them - keeps crashing, while another works just fine.

It begun before the update, and still happening after.
I've tried re-installing the server, OS and even using a different physical server - nothing worked.
Plugins are the same as 2 months ago - this build was working just fine
Windows Server 2019, build 1809, ver 17763.1518
Intel core i9-9900k, 32gb ram, ssd
I don't have a solution, sorry.
5e13a8d5b2bc5.jpg Wulf
I don't have a solution, sorry.

I solved the problem. The problem was a large accumulation of entities at one point (0.0.0), when the player approached this point on the map, the server crashed.

What was accumulating at (0, 0, 0)? Was it RHIB's storage containers and fuel containers?
5df121d013ded.png runescape
What was accumulating at (0, 0, 0)? Was it RHIB's storage containers and fuel containers?

The plugin created the required entities for working at one point.
The solution is to distribute objects to different points.

Application Error 0xc0000005 is an Access Violation, which indicates..

1. Another process or thread attempts to access a file that is already being accessed.
2. OS-level file permissions preventing the application from opening a file.

Given that cleaning your world save eliminated the issue, it's likely the first problem. The file became so large that processes which normally happen in sequence (reading/writing a file) ended up overlapping (when they usually don't and shouldn't).

In other words, you can't read a file at the same time it's being written or vice versa. Else, access violation.