HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part I

EN Entity Error Codes 16-19
Entity Error Codes
If you request out-of-range values in the command value fields, or
if the entity is unsupported or does not exist, or if the request is
inappropriate, the printer responds with one of four possible errors:
z Invalid Entity
z Invalid Location
z None
z Internal Error
ERROR=INVALID ENTITY
If the entity type specified in the escape sequence is out of range
or unsupported, an invalid entity error is returned. For example, if
the Inquire Entity command contained an out of range value of 8
(
E
C
*s8I), the following error response would be generated.
PCL
INFO ENTITY
ERROR=INVALID ENTITY
ERROR=INVALID LOCATION
If the entity type is valid but the location (either the type, the unit, or
the combination) is invalid or if the specified device is not installed,
an invalid location error is returned. For example, if you requested a
status for a cartridge type but identified an out of range location unit
of 9 (
E
C
*s5t9U), the following error response would be generated:
PCL
INFO FONTS
ERROR=INVALID LOCATION