You installed a new release of DIAGRAMS, DBWorx (PIDMO), and any other application requiring 64-bit Access and receive the error shown below


Microsoft does not support side by side installation of 64-bit and 32 bit Microsoft Office


You can install the 64-bit engine passively through a command prompt to have them both installed.

  • Ensure the mso.dll is NOT present in the registry under key below:

2010 = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Common\FilesPaths"

2016 = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\Common\FilesPaths" 


  • Run the Command Prompt by typing CMD in the Windows search bar at the start menu. By right clicking on the cmd.exe that is found and choosing Run as Administrator.

  • At the command prompt type:

            2010 = "C:\Program Files\ECE Design\DBWorx\Support\AccessDatabaseEngine_x64.exe" /passive

            2016 = "C:\Program Files\ECE Design\DBWorx\Support\AccessDatabaseEngine_x64.exe" /quiet

  • During the install you will see (note, it may flash on the screen very quickly!)



If the mso.dll is found before manually installing the 64-bit Access Database Engine, you should already have 64-bit Microsoft Office installed. 

Download Access Database Engine 2016 64 bit