Requirement:
Need to print from DOSBox, to a LAN based printer

Problem:
Printer is receiving the print job, takes the paper in and does nothing, as if it's waiting for some more data to complete the job ?

dosbox.conf:
printer=true
dpi=360
width=85
height=110
printoutput=printer
multipage=false
docpath=.
timeout=0

parallel1=file dev:lpt1

On the host computer, I use this to send it to the LAN baseed printer, which is an Epson Stylus RX520:

NET USE LPT1: "\\computername\sharename" /PERSISTENT:YES

On DOSBox I send a simple print job like this:
ECHO helloworld > LPT1: