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Experience Sitecore! | Sitecore Docker breaks when running Build.ps1 with "hcsshim::PrepareLayer failed in Win32: Incorrect function. (0x1)" message

Experience Sitecore!

Martin Miles on Sitecore

Sitecore Docker breaks when running Build.ps1 with "hcsshim::PrepareLayer failed in Win32: Incorrect function. (0x1)" message

Recently I was trying to build docker images from the main Sitecore repository, and got quite a weird message.

hcsshim::PrepareLayer - failed failed in win32 : Incorrect function. (0x1)

This message is not self-explanatory and it fired up when the actual build for the first image took place, in my case that was SQL server 2017. Some other details: quite fress and new instance of Windows 10 x64 build 1909, using Hyper-V, no docker / images previously been utilized at thtis computer.

After few hours long googling, I came to understanding that was caused by c:\windows\system32\cbfsconnectnetrdr2017.dll referenced by autorun. There is one halpful tool that helps out troubleshoouting such issues - Sysinternals Autoruns. Here is the output generated by Autoruns for my system:

What is that DLL and how did it get to my machine? CBFSConnect is a known library for creating and managing virtual filesystems for cloud storage providers such as such as Box, Dropbox etc., and this DLL is a kernel mode system drive. Sometimes it may be a leftover from a previously installed software, that was not uninstalled fully and properly.

Depending no your system you may see this DLL as either:

  • C:\Windows\system32\cbfsconnectnetrdr2017.dll  - for newer systems, or
  • C:\Windows\System32\drivers\cbfs6.sys
You may check if it is running or no tby running  a command-line utility for common minifilter driver management operations command (a command-line utility for common minifilter driver management operations):

The easiest I found was to just simply rename this driver. Once restarted, docker build worked well.

Hope this helps someone
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