ScanGear MF - Cannot communicate with the Scanner

[JohnBay]

I have the MF-455DW printer/scanner. I have installed the drivers and the MF Scan Utility and am connected via WIFI. The printer works fine, however, when scanning either from the printer or from the Scan Utility, I get the error box: ScanGear MF: Cannot communicate with the scanner. The cable may be disconnected, or the scanner may be turned off. Check the scanner status and try again. Scanner driver will be terminated. Note that I get the same error on the computer in either case - initiating from the computer or the printer.

Can anyone please provide some help?

[Danny]

Thanks for joining the conversation, JohnBay!

So that the Community can help you better, we need to know exactly which operating system is running on your computer (i.e. Windows or macOS, and which version thereof). That, and any other details you'd like to give will help the Community better understand your issue!

If this is a time-sensitive matter, click HERE search our knowledge base or find additional support options HERE.

Thanks and have a great day!

[JohnBay]

Danny, now that I have responded to your request 6 weeks ago, are there any additional suggestions?

[JohnBay]

I am running Windows 11

[JohnBay]

 I have just verified that I can scan with an IOS device on the same network using the Canon Print app.

[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.

[JohnBay]

Thank you for this. Unfortunately, KB5048162 was already installed. I did however try the optional updates as a test. No luck. I do believe this is a microsoft issue, however. 

[jims145]

Sorry no luck for you but glad it worked for me.  Keeping fingers crossed for you....

[Kevinaz]

Did you ever figured out a solution. I have the exact same issues with MF-455DW printer/scanner. I have the same windows and same circumstances. 

[JohnBay]

Sorry, I have not resolved this yet. I now use a scanning program from Windows called Scan. 

I find it very "interesting" and a bit concerning that Canon has left this issue unresolved. This forum appears to be unmonitored by folks that should be able to solve these issues. You would think they would want their users to sing their praises rather than chat among ourselves to find a solution to their issue.

Good luck.