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?
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).
It takes a few moments to register the DWF viewer the first time a DWF file is displayed.
Once DWF support is installed, you can convert DWFs to TIF files on the Image Tab.