You installed a new release of PIDMO 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:


  • 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:

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

  • During the install you will see

  • Open the Registry Editor by typing regedit in the Windows search bar at the start menu.

  • Rename the mso.dll value to in the following key



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