Problem

When trying to add DWF files to a project or access a DWF image in an existing project this error message displays:

 

DWF support is not currently installed.  Would you like to download and install it now?

Resolution

To view DWF files, Autodesk® Design Review (DWF viewer) must be installed.  Please perform the following steps to download and install these files.

Once the installation is finished, re-launch On-Screen Takeoff - and add the DWF files to a project (or access an existing project containing DWF files).

Once DWF support is installed, you can convert DWFs to TIF files on the Image Tab.