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Q168222: Error Message: "Port in Use" or "Port Already Open"

Article: Q168222
Product(s): Microsoft Windows 95.x Retail Product
Version(s): 95
Operating System(s): 
Keyword(s): kberrmsg kbtool dun win95 kbDialUp
Last Modified: 28-JUL-2001

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The information in this article applies to:

- Microsoft Windows 95 
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SYMPTOMS
========

When you attempt to start a communications program, you may receive one of the
following error messages:

  Error: port in use

  OpenComm: Port already open

CAUSE
=====

This behavior can occur if Rnaapp.exe is active in memory.

RESOLUTION
==========

To work around this issue, follow these steps:

1. Press CTRL+ALT+DELETE to open the Close Program dialog box.

2. Click Rnaapp to select it, and then click End Task.

3. Start your communications program.

MORE INFORMATION
================

When you finish using a communications program and close the connection,
Rnaapp.exe is still running and the port remains unavailable to non-TAPI
programs.

Rnaapp.exe is left in memory to allow TAPI programs to open faster. Rnaapp.exe is
eventually unloaded from memory (unless Dial-Up Networking Server is set to
allow caller access), but it may take 10-15 minutes.

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Keywords          : kberrmsg kbtool dun win95 kbDialUp 
Technology        : kbWin95search kbZNotKeyword3
Version           : 95

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