How do I trap an error that can error due to Invalid Path specified in XPath. For example I am trying to look for attribute with some name say 'Test', which is not available.

are you talking about using selectSingleNode method in MSXML? You could do:
Set node = domDoc.selectSingleNode("<<your XPATH>>")
If node Is Nothing Then
   ' its not there
Else
   ' it is there

Or you could do:
If domDoc.selectNodes("<<your XPATH>>").length = 0 Then
  ' its not there
Else
  ' it is there

If you just try to get the text without checking whether the node/attribute exists you'll get error 91 so you could trap for this if you want:

hth - if not pls post some code so we can see what you're using
Phil

Hi,
Thanks for the response.
The problem I have is that, whenever I use "selectSingleNode". I might get the error "Object or With Block not Set". This happens when my XML does not match the XPath.
So, this code,
Set node = domDoc.selectSingleNode("<<your XPATH>>")
may give out an error before I proceed to
If node Is Nothing Then
   ' its not there
Else
   ' it is there

Thanks,
Babloo

Yes that error is error 91. But you shouldn't get that error unless you try to access some property of the node/attribute without first checking that it exists.

Example:
domDoc.selectSingleNode("<<your XPATH>>").text will generate that error if the node/attrib doesn't exist, but
domDoc.selectSingleNode("<<your XPATH>>") will not error, it will just return Nothing.

Hi Phil,

Thanks a lot for the help.
So, this works.
    Dim x1 As New MSXML.DOMDocument
    x1.loadXML ("<P><T a='1' n='ttt'/><T a='2' n='yyy'/></P>")
    MsgBox x1.selectSingleNode("//T[@a=4]") Is Nothing 'Returns False
    MsgBox x1.selectSingleNode("//T[@a=2]") Is Nothing 'Returns True

Wow.
Tanks again Phil.

Babloo.