CMM-Manager (64 or 32-bit) communicates to the controller via the 32-bit “UCDBW.dll” (version 4.0.0.0 or newer). This file, along with the "UCDBW.ini" file, can be obtained from the OEM device driver disk or the PC which runs the OEM metrology software.

- The files are normally located under the install directory of the OEM metrology software, for example, "C:\MCOSMOS_VXX\EXE".
- If the files cannot be located, try using the files included in the ComUC USB Driver package linked above - in the "32BitApp" folder.

- If the files are located in "C:\Program Files\Common Files\Mitutoyo\UC", MCOSMOS is 64-bit (version 5.0 and above), and the installed "UCDBW.dll" cannot be used. Try using the files included in the ComUC USB Driver package linked above - in the "32BitApp" folder.
The "UCDBW.dll" and "UCDBW.ini" files need to be copied to the following location:
- Windows 64-bit OS
- CMM-Manager 2020 or later:
- C:\Program Files (x86)\Common Files\QxSoft\CmmServices
- CMM-Manager 3.8 - 3.10:
- C:\Program Files (x86)\Common Files\Nikon\NMCmmServices
- CMM-Manager pre-3.8:
C:\Windows\SysWOW64
- Windows 32-bit OS
- C:\Windows\System32

If you get the error "CMM is offline" when trying to connect to the CMM, check the following:
- "UCDBW.dll" is the right version
- "UCDBW.ini" is in the same location as "UCDBW.dll"
- UC400 USB device shows in Windows Device Manager
- CMM is on and MCOSMOS can connect if installed
- Antivirus or security software doesn't block driver communication