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# Print Jobs Incomplete or Corrupt with Serial Printing

Article ID: 112016

Article Last Modified on 11/1/2006

APPLIES TO

- Microsoft Windows NT Advanced Server 3.1
- Microsoft Windows NT Workstation 3.1

This article was previously published under Q112016

## SYMPTOMS

When you print to a serial printer, especially at baud rates above 2400, data may be lost and print jobs may be incomplete or corrupt.

## CAUSE

This problem occurs when the Windows NT kernel does not pass flow control information from the serial port(s) to Print Manager correctly.

## RESOLUTION

A change was made to KERNEL32.DLL to correctly pass hardware flow control to Print Manager.

## STATUS

Microsoft has confirmed this to be a problem in Windows NT and Windows NT Advanced Server version 3.1. This problem has been corrected in the latest U.S. Service Pack for Windows NT and Windows NT Advanced Server version 3.1. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt printing overflow mode

Keywords: kbprint KB112016