broken pipe

[Greger]

errors in /var/log/messages=>
<snip>
Mar 29 05:18:17 localhost foo2zjs-wrapper: gs -sPAPERSIZE=letter -g10200x6600 -r1200x600 -sDEVICE=pbmraw
Mar 29 05:18:17 localhost foo2zjs-wrapper: foo2zjs -r1200x600 -g10200x6600 -p1 -m1 -n1 -d1 -s7 -z1  -u 192x96 -l 192x96 -L 0     -P
Mar 29 05:18:19 localhost HP_LaserJet_1020?serial=JL19BFQ: unable to send Event hp:/usb/HP_LaserJet_1020?serial=JL19BFQ 201 501: Broken pipe
</snip>


obviously the printer ( a hp laserjet 1020 ) is recognized, but seems to be no pipe to stream to,

could anyone please help me to correct this?