Why does Windows state an error at startup of Cinema 4D: "libmmd.dll was not found"?

Overview

Cinema 4D (and other apps) require the Intel runtime libraries libmmd.dll and svml_dispmd.dll. If these files are missing or corrupted, Cinema 4D may fail to start.

Symptoms

• Cinema 4D does not launch or shows an error mentioning libmmd.dll or svml_dispmd.dll.
• Recent system cleanup or software changes removed/overwrote Intel libraries.

Solution 1 — Restore the DLLs from your Cinema 4D installation

Note: If these files already exist in C:\Windows\System32, back them up before replacing.

1. Open C:\Program Files\MAXON\Cinema 4D\resource\libs\win64.
2. Copy libmmd.dll and svml_dispmd.dll.
3. Paste them into C:\Windows\System32.
4. Launch Cinema 4D and verify it starts normally.

Solution 2 — Reinstall the Intel runtime (if the issue persists)

1. Search your system for any existing copies under C:\Program Files (x86)\Common Files\Intel\Shared Libraries\redist\intel64_win\compiler. If found and corrupted, delete them and restart Windows.
2. Open your Cinema 4D installation media and navigate to \bin\data\redist\.
3. Run ww_icl_redist_intel64_2016.4.246.msi to install the Intel compiler redistributables.
4. Restart Windows and launch Cinema 4D again.

Notes

• Different applications may install different versions of these DLLs. Keeping a backup of working copies can help with future troubleshooting.
• Administrator rights are required to write to System32.