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Troubleshooting Code 800704B0 – The specified device name is invalid
Introduction to Code 800704B0
This error code, 800704B0 usually occurs when you try to map a network drive with a VBScript. WSH is probably using a method called MapNetworkDrive or AddPrinterConnection. Here is a wild guess, you have omitted the : (colon) on the Drive letter e.g. it should be = "M:" but you entered = "M".
The Symptoms You Get 
The script does not execute as you hoped, instead you get a WSH error message. The probable scenario is that you are trying to create a Windows logon script.
The Cause of Error 800704B0
The problem is that you made a mistake with the drive letter. It is not plain "M", it should have a colon and so be "M:" Note that Source: WSHNetwork.MapNetworkDrive gives a valuable clue. WSH has indicated Line 10, which narrow down the search. Char 1 is not very helpful in this case. What happens if there is an error on the line, sometimes Char 1 gets blamed.
Solutions for The specified device name is invalid
Edit Line 10
WShNetwork.MapNetworkDrive "M", RemotePath
Change the "M" to "M:"
WShNetwork.MapNetworkDrive "M:", RemotePath
Check this section for examples of MapNetworkDrive
‡
Example 1 of Script 800704B0
Set WshShell = WScript.CreateObject("WScript.Shell")
Set WshNetwork = WScript.CreateObject("WScript.Network")
Set AllDrives = WshNetwork.EnumNetworkDrives()
DriveLetter = "M:"
RemotePath = "\\alan\home"
strRemoteName = "Guy"
WShNetwork.MapNetworkDrive "M", RemotePath
WshShell.PopUp "Drive " & DriveLetter & " connected successfully."
Example 2 of Script 800704B0
objNetwork.addPrinterConnection "HP 4L", "\\Lucy4\HP Laser 4L"
Too many arguments, and also wrong method.
What it should be is :
objNetwork.addWindowsPrinterConnection "\\Lucy4\HP Laser 4L"
Also note there is only one argument, the name of the shared printer.
‘ HPPrinter.vbs
‘ Script to map an HP Printer from the Lucy4 server
‘ Version 1.1 August 2010
‘ Guy Thomas https://computerperformance.co.uk
Option Explicit
Dim objNetwork
Set ObjNetwork = CreateObject("Wscript.Network")
objNetwork.addPrinterConnection "HP 4L", "\\Lucy4\HP Laser 4L"
Wscript.echo " Share Mapped "
Wscript.Quit
‘ End of Guy’s script
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Do you need additional help?
- For interpreting the WSH messages check Diagnose 800 errors.
- For general advice try my 7 Troubleshooting techniques.
- See master list of 0800 errors.
- Codes beginning 08004…
- Codes beginning 08005…
- Codes beginning 08007…
- Codes beginning 0800A…
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