Kent:
HP did away with the bicomm.drv scheme with the release of v.1.35 of the LJ4
driver. Make sure you are using v.1.35 or 1.50 (which is in Library (4) as
L4WIN3.ZIP). The comm.drv that is written to Windows with the install of the
HP driver has been provided by Microsoft, so if your other application has
written over the comm.drv — you may need to follow up with them about
resolving the conflict. To get around this, you may need to turn off the
status monitor for the LJ so that the bidirectional communication doesn't take
place (which the comm.drv allows).