Problem with the Copy Command and Multiple Parallel Ports

• Microsoft Windows NT operating system version 3.1
• Microsoft Windows NT Advanced Server version 3.1
• Microsoft Windows NT Workstation version 3.5 and 3.51
• Microsoft Windows NT Server version 3.5 and 3.51

SYMPTOMS

If you have two or more parallel ports using the same IRQ and you copy files directly to the printer port(s) from a command prompt using the Copy command, the file may not be directed to the correct port (printer). Note this happens when you use the Copy command locally or to its shared networked printers.

RESOLUTION

To work around this problem, put the LPT ports on unique IRQs.

MORE INFORMATION

Steps to Reproduce Problem

On a computer with two or more printer ports installed on the same IRQ (usually 7), do the following:

1. Open a command prompt or CMD.

2. Copy a file using the following command:

   Copy C:\WINNT\SYSTEM32\CONFIG.NT LPT1:

NOTE: This problem only occurs when you are using the Copy command to port commands.