Canon imagePROGRAF GP-4000 - Manual (Page 785)

Step 2 Solve the Problem, Using IJ Network Device Setup Utility
Diagnose and repair the network connections using IJ Network Device Setup Utility.
Download IJ Network Device Setup Utility from the below page, and install it on your computer.
Checking Printer Connection Status Using IJ Network Device Setup Utility
If you can connect to the network, try to set up from the beginning.
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