HP Network Port Disappears After User Selects Secondary Adapter

• Microsoft Windows NT Server versions 3.51 and 4.0
• Microsoft Windows NT Workstation version 4.0

SYMPTOMS

On a system configured with one network interface card (NIC) and the data link control (DLC) protocol, there is an option to select a Secondary (1) Adapter (as opposed to Primary (0) Adapter). When you select this option and restart the system (or stop and restart the spooler service), the Hewlett-Packard Network Port disappears from the list of Available Print Monitors. Reinstalling DLC does not fix the problem.

To find the option to select a Secondary (1) Adapter in Windows NT 4.0:

1. Open the Printers Folder and select Printer. On the File menu, click Server Properties, click the Ports Tab, and click Add Port.

2. Select Hewlett-Packard Network Port, then select New Port.

3. Under Options, select a Secondary (1) Adapter.

1. In Print Manager, on the Printer menu, select Create Printer, and select Other in the Print to box .

2. Select Hewlett-Packard Network Port.

3. Under Options, select a Secondary (1) Adapter.

   “The selected port cannot be deleted.  Requested resource is in use”

EXPLAINATION

On some servers, you can stop the Spooler service, unplug the NIC cable to The printer in question, and restart the Spooler service. If this causes All DLC ports to disappear and if all queues using a DLC port seem to Disappear, then look in the Registry to very that the entries for the Hewlett-Packard Network Port is still listed as a monitor in the Registry Under:

   HKLM
    \System
     \CCS
      \Control
       \Print

CAUSE

Secondary (1) Adapter is selected when no secondary adapter is present.

RESOLUTION

WARNING: Using Registry Editor incorrectly can cause serious system-wide problems that may require you to reinstall Windows NT. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

To change the adapter selected back to Primary (0):

1. Run the Registry Editor (Regedt32.exe).

2. Under the HKEY_LOCAL_MACHINE subtree, go to the following subkey:

         System\CurrentControlSet\Control\Print\Monitors\Hewlett-Packard
         Network Port\Options
   

3. Double-click Adapter:REG_DWORD:0x1.

4. In the DWORD Editor dialog box, change data from 1 to 0 and click OK.

5. Exit Regedt32.exe.

6. Stop and restart the spooler service.