MF743CDW MF Scan Utility/ScanGear gives "cannot communicate with the scanner" Error

[gonzo070777]

I just transitioned to a new computer and when through the usual install of the latest "[Windows 64bit] MF743Cdw/MF741Cdw MFDrivers (Generic Plus UFR II / Generic FAX / ScanGear)"  and latest "[Windows 32bit & 64bit] MF Scan Utility Ver.1.21.0.2"  However whenever I try to scan from the printer to the device or try to launch ScanGear from the MF Scan Utility on the local computer I get the same "cannot communicate with the scanner" Error as shown below.

I installed the MS Scan app and that works just fine. I can preview and scan just fine so it appears to be an issue with the MF Scan Utility/ScanGear app.

Steps I have taken so far:

• I have made sure the apps have exceptions in the firewall
• I have tried turning off the firewall completely with the same result
• Uninstall and reinstall both of the above packages multiple times with reboot after each
• made sure that Windows Image Acquisition (WIA) is set to automatic based on various forum postings
• I can print just fine
• I can scan using the MS Scan App (but I still cannot use the scan to computer feature from the printer)
• Fixed IP assigned for both the computer and Printer

Any help would be greatly appreciated as I need to be able to use this feature again on my new device.

[mbeshara]

I am having this exact same problem today.

[lonquist]

Me also, just different printer/scanner

[jims145]

I just had to do a Clean Install of Windows 11 and found too that the MF Scan Utility would not communicate with my MF726Cdw.  I even installed (and left it in place) the Windows 10 (x64) [Windows 32-bit & 64-bit] Patch for Network Scan, USB Scan.  Still no luck.

During my Windows 11 re-install, updates also were installed: 2024-12 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5048667) and 2024-11 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5045934). 

Still had issues UNTIL...

An optional Windows update was also posted: 2024-11 Cumulative Update Preview for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 for x64 (KB5048162) was installed today and voila!!  MF Scan Utility now communicates with my MF726Cdw!!  It looks like Microsoft fixed something.