Microsoft KB Archive/168222

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

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Q168222

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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.

Keywords : kberrmsg kbtool dun win95

Issue type :

Technology : kbWin95search kbWin95