Pixma G7020 scan communication error while using IJ Scan Utility

[rbwilliams76]

I have a Pixma G7020 printer/scanner.  I downloaded the MP drivers from the Canon website. My computer and printer are connected to the same wi-fi router.  The printer prints fine from my computer running Windows 11. Use the IJ Scan Utility app to try to scan.  When I select the auto button in the scan app the printer scanner starts scanning. However after the scanning stops I receive an error message--"cannot communicate with scanner."  Listed error codes are "2, 157, 50." 

I uninstalled and then reinstalled the MP drivers/IJ Scan Utility from Canon; I checked my Bitdefender antivirus and confirmed that IJ Scan Utility had permission to communicate with the computer; the computer is obviously communicating with the scanner because the scanner runs after starting it in the app; and I confirmed that the correct printer/scanner, "Canon G7000 series Network", is the selected scanner. Ultimately I don't get a scan of my document to save to my computer.  After wrestling with this for over 5 hours I am at a loss as to why the scanner is not operating correctly.

[jimktm]

Did you ever solve this?  I have exact same symptoms with my G7020 in Windows 11.  If I reboot Windows, then sometimes I can scan a page or two, but then it gets the connection error and I'm back to square one.  I have uninstalled/reinstalled all the Cannon software, printer has latest firmware, Windows has all latest MS updates.

Printing works fine, so it's not a WiFi connection problem.

[rbwilliams76 · Accepted solution]

I did.  I too was having difficulty with the fact that my WiFi signal was strong enough to allow me to print but did not support the scanning function.  After further research, I noticed that one of the problem areas that was identified was the existence of a weak WiFi signal.  I upgraded to fiber internet and placed the router in the same room as my computer and printer.  Once I did that and again used the IJ Scan Utility the printer scanned my documents without issue and  I was able to save them.  Bottom line is for you to try and improve the strength of your WiFi signal to your computer and printer.

[jimktm]

My printer is only 4 feet from my WiFi router, and the computer is hardwired to the router, so I think I must have a different issue.