Canon imagePROGRAF GP-4000 - Manual (Page 718)

Roll Paper Is not Switched Automatically
When using certain paper types and widths under certain temperature and humidity conditions, roll paper
auto switching may not be possible.
Set Paper retention settings to Release in the touch screen menu and feed the paper manually.
Menu Structure
Loading the Upper Roll on the Printer
Loading the Lower Roll on the Roll Unit (Option)
Note
• Roll paper cannot be fed or switched automatically until you change this setting.
If the roll cannot be switched at the end, make sure Switch roll paper when low is set to Enable .
Paper Source Does Not Switch When Roll Paper Is Used Up
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