Canon MG8100 series On-Screen Manual page 976

Printing does not start even though the port named "CNBJNP_xxxxxxxxxx" is selected
when the machine is used over LAN:
Launch the Canon IJ Network Tool, and select "CNBJNPxxxxxxxxxx" as you confirmed in
step 4, then associate the port with the printer using Associate Port in the Settings menu.
If the problem is not resolved, reinstall the MP Drivers.
Check 11: Is the size of the print data extremely large?
Click Print Options on the Page Setup sheet. Then, select the Prevent loss of print data check box in
the displayed dialog.
Page top