Hello oaltun, ktech, doshi_am, and Lhenion.
The MF732Cdw is a non-US model; while I'll do my best to assist, you may need to seek support from the region in which the MF732Cdw was initially released.
If this error is following a Mac OS system update, try first moving the following drivers to the trash from the following folders:
Mac HD > Library > Image Capture > TWAIN Data Sources > Canon MF732cdw series
Mac HD > Library > Image Capture > Image Capture > CanonMFscanner
(Note: depending on version of Mac OS and what was previously installed, one of the above entries may no longer be present)
Next, move the MF Scan Utility folder from Applications > Canon Utilities to the trash.
After the above, download and reinstall the latest drivers from the appropriate Canon support page (you may find your region using the map at http://global.canon/en/support/)
If you need immediate assistance with this issue, please contact the appropriate branch of Canon through the above Canon Global map.
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