My printer is Epson Workforce Pro WF-3730. Print function works fine. But since updating to macOS Sequoia 15.0, the scanner won't work. I get the error message "Failed to open a connection to the device (-21345)". Help?
iMac 27″, macOS 15.0
Check in System settings>Privacy and Security and scroll to Local Network.
See if there is anything there that looks like an Epson process and turn it on.
Mind you this process may not be obvious by name, so if it were me, I would take a screen shot, turn them all on and see if you can scan. If the answer is yes, I would try to isolate which one is Epson, leave it on and turn the others off.
FYI, one of Epson's processes in this area is "commandtoescp"….who would know that this is related to Epson !!!
You may not have this process, this is just an example.
Hope this helps
Check in System settings>Privacy and Security and scroll to Local Network.
See if there is anything there that looks like an Epson process and turn it on.
Mind you this process may not be obvious by name, so if it were me, I would take a screen shot, turn them all on and see if you can scan. If the answer is yes, I would try to isolate which one is Epson, leave it on and turn the others off.
FYI, one of Epson's processes in this area is "commandtoescp"….who would know that this is related to Epson !!!
You may not have this process, this is just an example.
Hope this helps
Sep 23 2024
After upgrading Mac Mini M1 to MacOS 15.0 Sequoia, print jobs sent to Epson 4150 queued up with a searching for printer msg but would not print.
Could ping printer, could print a test page & could print to the Epson 4150 from other devices.
Did what others said and went to System settings>Privacy and Security, Local Network. All applications were toggled on except 'rastertoescpII'. Toggled 'rastertoescpII' on and print job started up immediately. Thank you all!
From my notes...
Failed to open a connection to the device (-21345)
Failed to open a connection to the device (-21355)
Disabling IPv6 from the printer's control panel may resolve this issue.
You should check Epson's website for any updates to for your printer.
They haven't updated to 15.0.The call centre said Oct/Nov.I also contacted America and they wouldn't assist in any idea of updates.This is the answer I received from Epson.
Thank you for contacting Epson Support.
We strongly recommend using only the Printer Driver for SureColor P906 provided by Epson Australia/New Zealand. Driver for other region/country(ie. Epson US/America) not compatible with the printer's firmware and may lead to setting/communication issue. Once driver becomes available, it will be readily available from epson.com.au.
Hi,I rang epson today and I gather the 15.0 will come out in October/November.I did notice there was a download for 15.x for the American Epson site.I have sent them a email.
Spent about an hour trying everything then googled it and saw your message and bang all done, Thanks for the screenshot mate
Epson Driver Needed for 15.0 Mac OS
