No print controls defined for tray selection for device type &

What causes this issue?

You switch between the various paper trays of an output device using
print controls. The print control "TRY01" contains the instruction for
the device to print on paper from the first paper tray, "TRY02" for the
second tray, and so on.
There is no print control defined for tray selection for the device
type used. That also means administration of tray selection is not
possible.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

First define the necessary print controls. For information about the
switch commands, see your printer manual.
If the printer only has one tray, but you want to control output
requests using resource assignment, you can enter the current resource
for tray 1.
Information about which resource is available for the individual trays,
and whether you are allowed to use the tray, can be entered using the
RFC-compatible function module RSPO_SET_RESOURCE.

Error message extract from SAP system. Copyright SAP SE.