13.9. Specific OS notes

13.9.1. CamCOPS client won’t run under Windows Server

Under Windows, server, MF.dll is reported as missing.

What follows assumes 64-bit CamCOPS under 64-bit Windows.

This error can appear under e.g. Windows Server 2008 R2 64-bit (Windows 6.1.7601), when the CamCOPS client is launched. This component is part of “normal” desktop Windows, but not Windows Server (https://serverfault.com/questions/562362/program-missing-dlls). Download and install the Windows Media Services 2008 for Windows Server 2008 R2 package from https://www.microsoft.com/en-gb/download/details.aspx?id=20424. (See also https://support.microsoft.com/en-ca/help/963697/how-to-install-windows-media-services-for-windows-server-2008-r2; potentially relevant.)

The trouble is that this creates thousands of directories within C:\Windows\winsxs, each with a single file in, so (for example) MF.DLL and MFPlat.DLL are in separate directories.

So, copy the most recent OS-relevant version of the following into C:\Windows\system32:

  • MF.DLL
  • MFPlat.DLL
  • MFReadWrite.DLL
  • api-ms-win-core-winrt-l1-1-0.dll.DLLstuck; missing

For example, from an administrative command prompt:

cd c:\windows\system32
copy C:\Windows\winsxs\amd64_microsoft-windows-mediafoundation_31bf3856ad364e35_6.1.7601.24146_none_faf014703c95b62f\mf.dll .
copy C:\Windows\winsxs\amd64_microsoft-windows-mfplat_31bf3856ad364e35_6.1.7601.23471_none_5516292583660fc2\mfplat.dll .
copy C:\Windows\winsxs\amd64_microsoft-windows-enhancedvideorenderer_31bf3856ad364e35_6.1.7601.23471_none_ee0e0e23fc773db4\evr.dll .
copy C:\Windows\winsxs\amd64_microsoft-windows-mfreadwrite_31bf3856ad364e35_6.1.7601.17514_none_177bed732ea3f85f\mfreadwrite.dll .


Not yet fixed.

Decision: Windows Server is an unsuitable OS for the CamCOPS client. (It should be fine for the CamCOPS server!) Use a client edition of Windows for the CamCOPS client.