Conflict Between HP 5L Printers
and the Sentinel
The Windows software drivers that come with the Hewlett Packard
HP 5L (and possibly later) laser printers include support for bi-directional
parallel ports that can cause a conflict with the LabelVision Sentinel
in Version 2.2 or prior. The symptoms are that LabelVision fails
to recognize the Sentinel, even though it is attached to the parallel
To fix this problem, you can either upgrade LabelVision, attach
the Sentinel to a different parallel port, or follow the directions
below to install the alternate HP 5L drivers.
HP 5L Drivers
Start the Notepad accessory from the Accessories group of the
From the Windows installation directory open the file WIN.INI.
Locate the line that begins with "Load=" in the [Windows] section.
The "Load=" line will contain the file WPWHRC.EXE, which is
the HP 5L driver. Remove WPWHRC.EXE from the "Load=" line, leaving
all other programs on that line intact. If WPWHRC.EXE is the only
command on the line, you should still leave the "Load=" at the
start of the line.
Choose Save from the File menu of Notepad, then exit Notepad.
Insert the HP 5L software installation disk #1 (which came with
your HP printer) into drive A:.
Choose the Run command from the File menu of the program manager,
and type A:SETUP, then press OK.
Click on the CUSTOM button and select the HP PCL DRIVERS option.
Continue with the driver installation.. As a last step, the
installation program will restart Windows. Your Sentinel should
now work correctly.
After the installation is complete, the "WPWHRC.EXE" you removed
from the "Load=" command in WIN.INI will be replaced with "HPLJSW.EXE".