System.InvalidCastException error...

[Michael]

Hello all and thanks in advance,

I'm running a vb.net program and part of it copies files
from one server to another.

It generally works fine but once in a while I get this
error:

System.InvalidCastException: QueryInterface for interface
Scripting.IFileSystem3 failed.
at Scripting.FileSystemObjectClass.FolderExists(Strin g
FolderSpec)
the line it fails at looks like this:

If fso.FolderExists(srcDir2) Then
....
End IF

Could some one please give me some insight as to why this
error keeps poping up.

Thanks,
Michael

[Jeremy Cowles]

"Michael" <mi*****@hotmail.com> wrote in message
news:0d****************************@phx.gbl...

Hello all and thanks in advance,

I'm running a vb.net program and part of it copies files
from one server to another.

It generally works fine but once in a while I get this
error:

System.InvalidCastException: QueryInterface for interface
Scripting.IFileSystem3 failed.
at Scripting.FileSystemObjectClass.FolderExists(Strin g
FolderSpec)
the line it fails at looks like this:

If fso.FolderExists(srcDir2) Then
...
End IF

Could some one please give me some insight as to why this
error keeps poping up.

Thanks,
Michael

Am I missing something or are you still using the Scripting COM objects? If
you are, you should really consider using the System.IO namespace. It will
be much easier.

Jeremy

[Stephen Muecke]

Michael
It is preferable to use the methods in File and Directory classes of
System.IO to manipulate files, rather than using scripting (ie.
FileSystemObject)
eg
Imports System.IO
If Directory.Exists("...") Then
.....
End If

Stephen

"Michael" <mi*****@hotmail.com> wrote in message
news:05****************************@phx.gbl...

-----Original Message-----
"Michael" <mi*****@hotmail.com> wrote in message
news:0d****************************@phx.gbl...

Hello all and thanks in advance,

I'm running a vb.net program and part of it copies files
from one server to another.

It generally works fine but once in a while I get this
error:

System.InvalidCastException: QueryInterface for interface Scripting.IFileSystem3 failed.
at Scripting.FileSystemObjectClass.FolderExists (String FolderSpec)
the line it fails at looks like this:

If fso.FolderExists(srcDir2) Then
...
End IF

Could some one please give me some insight as to why this error keeps poping up.

Thanks,
Michael

Am I missing something or are you still using the

Scripting COM objects? If

you are, you should really consider using the System.IO

namespace. It will

be much easier.

Jeremy

.

I am using the System.IO namespace....
This error shows up in a
try...
catch e As exception ...
end try

statement.

Also fso is set as a New FileSystemObject

Michael