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= <span id="KB101812"></span>Problems Adding or Deleting Printer Ports in Print Manager =<br />
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Article ID: 101812<br />
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Article Last Modified on 10/31/2006<br />
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APPLIES TO<br /><br />
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* Microsoft Windows NT Advanced Server 3.1<br />
* Microsoft Windows NT Workstation 3.1<br />
* Microsoft Windows NT Advanced Server 3.1<br />
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This article was previously published under Q101812<br />
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WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.<br />
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== SYMPTOMS ==<br />
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In Microsoft Windows NT or Advanced Server, the Print To Additional Ports box in the Printer Details dialog box is for printer spooling. If you delete a printer port, you cannot retrieve it.<br />
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== RESOLUTION ==<br />
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To work around this problem, you have to add the deleted port back through the Registry Database, as shown below.<br /><br />
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WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.<br /><br />
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<li><p>Start the Registry Editor (REGEDT32.EXE) and go to the following subkey in the HKEY_LOCAL_MACHINE on Local Machine subtree:</p><br />
<pre class="fixed_text"> Software\Microsoft\Windows NT\CurrentVersion\Ports</pre></li><br />
<li>From the Edit menu, choose Add Value.</li><br />
<li>In the Value Name box, type the printer port that was deleted (for example, COM1: or LPT1:). Retain the default value in the Data box (REG_SZ), and choose OK.</li><br />
<li><p>In the String box, type the appropriate settings that correspond to the port you typed in the Value Name box, for example: <span class="kbd userinput"> </span></p><br />
<pre class="codesample"> 9600,n,8,1 for COM ports<br />
No entries for LPT ports</pre></li><br />
<li>Exit the Registry Editor. Log off and log on.</li></ol><br />
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== STATUS ==<br />
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Microsoft has confirmed this to be a problem in Windows NT version 3.1. We are researching this problem and will post new information here as it becomes available.<br />
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== MORE INFORMATION ==<br />
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Below are the default entries that appear in the Registry Database under the HKEY_LOCAL_MACHINE on Local Machine subtree for the following subkey:<br />
<pre class="fixed_text"> Software\Microsoft\Windows NT\CurrentVersion\Ports</pre><br />
<pre class="fixed_text"> Value name Data type String value<br />
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COM1: REG_SZ 9600,n,8,1<br />
COM2: REG_SZ 9600,n,8,1<br />
COM3: REG_SZ 9600,n,8,1<br />
COM4: REG_SZ 9600,n,8,1<br />
FILE: REG_SZ empty<br />
LPT1: REG_SZ empty<br />
LPT2: REG_SZ empty<br />
LPT3: REG_SZ empty</pre><br />
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Additional query words: prodnt<br />
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Keywords: kbprint KB101812<br />
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