Web Query Code

I am trying to import data from Yahoo, about half the time it works well, but the other half I get the Run-time error '1004' below.

Run-time error '1004':
The file could not be accessed. Try on of the following:
.. Make sure the specified folder exists.
.. Make sure the folder that contains the file is not read-only.
.. Make sure the file name does not contain any of the folloing charaters: < >
? [ ] : | or *
.. Make sure the file/path name doesn't contain more than 218

Sub GETOPTS()

Sheets("Sheet12").Select
Columns("e:u").Select
Selection.ClearContents

Dim QuerySheet As Worksheet
Dim DataSheet As Worksheet
Dim Symbol As String
Dim qurl As String
Dim nQuery As Name