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Network and Dial-up Connection Errors (MS Windows)
Listed here are Microsoft Windos Network and DUN errors along with some
tips, tutorials and fixes. Feel free to add your tip or
tutorial to the page with credit to the author by clicking on "Share a tip" link.
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DUN Error 631
:: The user disconnected the modem |
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| An action on your computer disconnected the line. Redial. |
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DUN Error 632
:: An incorrect structure size was detected |
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| An internal error occurred. Restart your computer to make sure that all recent configuration changes have taken effect. If the error persists, consult the Windows event log for detailed warnings or errors. |
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DUN Error 633
:: The modem is already in use or is not configured for dialing out |
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| If this is a dial-up connection, the COM port that the network connection attempted to use is already in use by another active network connection or another process (for example, a phone line monitoring program, such as a fax program). Quit the application that is blocking the use of the COM port.If this is a virtual private network (VPN) connection, the VPN device that the network connection attempted to use cannot be opened. If the problem persists, see your system administrator. |
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DUN Error 634
:: Your computer could not be registered on the remote network |
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| The remote access server cannot register the name of your computer on the network. This generally occurs with the NetBIOS protocol, but it may also occur with TCP/IP or IPX protocols. Typically, the error occurs when an address is already in use on the network. Contact your system administrator. |
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DUN Error 635
:: There was an unknown error |
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| An internal error occurred. Restart your computer to make sure that all recent configuration changes have taken effect. If the error persists, consult the Windows event log for detailed warnings or errors. |
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DUN Error 636
:: The device attached to the port is not the one expected |
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| Your hardware configuration and the configuration settings for your connection are probably inconsistent with each other. If you changed your communications equipment (such as a serial port or modem), make sure you reconfigure the connection. See To configure a connection. |
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DUN Error 637
:: A string was detected that could not be converted |
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| An internal error occurred. Restart your computer to make sure that all recent configuration changes have taken effect. |
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DUN Error 638
:: The request has timed out |
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| An internal error occurred. Restart your computer to make sure that all recent configuration changes have taken effect. |
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DUN Error 639
:: No asynchronous net is available |
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| Your NetBIOS network configuration is probably incorrect. Restart your computer to make sure that all recent configuration changes have taken effect. If the error persists, consult the Windows event log for detailed warnings or errors.If you call for help, record the Fail Code (a NetBIOS error code) and give it to the technical support staff. |
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DUN Error 640
:: A error has occurred involving NetBIOS |
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| The modem cannot negotiate a connection at the speed that is set. Set the modem to a lower initial speed, and then redial. See To change the maximum modem port speed. Also, try disabling modem compression and software compression. See To configure a modem for a dial-up connection or To disable software compression.If you still cannot make a connection, try adding the NWLink IPX/SPX/NetBIOS Compatible Transport Protocol to the connection. See To add a network component. |
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